This paper draws several thoughts on medical English learning.First,although students have the positive learning attitude and definite learning purpose,they are influenced by the conventional learning habit,so when learning,they depend on their teacher.Second,the emphasis of college English reform should be put on the change of the students' learning habit.Third,the teacher should teach the learning strategy to the students.

Objective To investigate the safety and feasibility of laparoscopic cholecystectomy (LC) in the treatment of portal hypertension conplicated by gallstones.Methods A retrospective analysis was performed for the clinical data of 96 patients with portal hypertension complicated by gallstones who underwent surgical treatment in The Fourth People's Hospital of Zigong from January 2012 to June 2016.These patients were divided into laparoscopic group with 50 patients who underwent LC and open group with 46 patients who underwent open cholecystectomy.The surgical conditions and changes in liver function after surgery were compared between the two groups.An analysis of variance with repeated measures was used for comparison of continuous data between multiple groups,and the least significant difference t-test was used for comparison between two groups;the t-test was used for comparison between two groups.The chi-square test was used for comparison of categorical data between groups.Results No deaths occurred during the perioperative period and no patient was converted to open surgery in the laparoscopic group.Compared with the open group,the laparoscopic group had significantly lower time of operation,intraoperative blood loss,length of hospital stay,hospital costs,and incidence rate of postoperative complications (t =2.075,7.389,4.839,and 3.809,x2 =4.697,all P ＜0.05).Both groups had increased or reduced serum levels of alanine aminotransferase (ALT),aspartate aminotransferase (AST),total bilirubin (TBil),and albumin (Alb) at 1 day after surgery,which gradually returned to preoperative levels at 3 or 7 day after surgery.The laparoscopic group had significant changes in the serum levels of ALT,AST,and Alb (F =201.85,185.55,and 4.570,all P ＜ 0.01),while the open group had significant changes in the serum levels of ALT,AST,TBil,and Alb (F =597.84,373.10,5.617,and 10.429,all P ＜ 0.01).There were significant increases in the serum levels of ALT and AST 1 day after snrgery in the laparoscopic group and at 1 and 3 days after surgery in the open group (all P ＜0.05),and at 1 and 3 days after surgery,the laparoscopic group had significantly lower serum levels of ALT and AST than the open group (t =12.537,18.370,9.548 and 15.118,both P ＜0.01).At 1 day after surgery,the open group had a significant increase in the serum level of TBil (P ＜ 0.05) and a higher serum level of TBil than the laparoscopic group (t =2.547,P =0.013).There were significant reductions in the serum level of Alb at 1 day after surgery in the laparoscopic group and at 1 and 3 days after surgery in the open groups (all P ＜ 0.05),and at 1 day after surgery,the laparoscopic group had a significantly higher serum level of Alb than the open group (t =2.291,P =0.024).Conclusion LC is safe and feasible in the treatment of portal hypertension complicated by gallstones,and compared with open cholecystectomy,it has the advantages of a minimally invasive surgery and causes less liver damage.

Objective To systematically analyze the effectiveness and security of Chinese medicinal ointment treating eczema for the purpose of making an objective and creditable evaluation and guiding clinical usage. Methods Data in the VIP database (1989-2008) and CHKD (1994-2008) were researched and literatures on the treatment of eczema were included. Randomized control trails (RCTs) of therapeutic effects were compared between Chinese medicinal ointment and western medical treatment. Jadad Scale was adopted and RevMan4.2.7 was used to conduct Мeta analysis. Results 11 RCTs were adopted, including 1415 cases.① Heterogeneity Test: It was found through analysis with fixed effect model that Q= 16.57, and P=0.08>0.05,which indicated that the effective between studies are homogenous. ② Total effect size' ORunited was 0.17,with the 95% confidence interval [0.29,0.58]. ③ x2=5.04 (P<0.01), P<0.05, the total ORunited had statistic significance, which indicated that the treatment of eczema with the Chinese Medicinal Ointment was obviously better than that of western medicinal Ointment. Conclusion It is a effective method to treat eczema with Chinese Medicinal Ointment, and there is no serious ADR. However, because of publication bias and RCTs of universal lower quality, the credibility of the conclusion was reduced.

Objective To investigate the effects of lidocaine throat surface anesthesia on hemodynamics in patients with surgical operation. Methods From January 2013 to April 2016, 118 cases of patients with upper abdominal surgery in our hospital, were randomly divided into observation group (n=68) and control group (n=50), the observation group were given lidocaine throat surface anesthesia, the control group did not give the throat surface anesthesia, observed two groups before induction of anesthesia (T0), before intubation (T1) and after 1 min (T2), 5min (T3) and 10min (T4) intubation, heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) and other indicators.Results The observation group T1 and T2 SBP, DBP, MAP were significantly lower than control group (P<0.05);observation group SBP at T4 was lower than control group (P<0.05);HR of observation group and control group was not statistically significant at each period;The incidence of cough and cough classification in observation group were 22.06% and (1.20 ±0.73), which were significantly lower than that of control group 58.00%and (3.18 ±0.57)(P<0.05).The observation group and the control group breathing recovery time and the time of opening eyes difference had no statistically significant.Conclusion The surface of lidocaine anesthesia can reduce the cardiovascular response to tracheal intubation in patients with surgery and postoperative cough.

Objective To assess the genetic toxicity and effects of cooking oil fume on oxidation-antioxidation level, immunity function of the workers occupationally exposed to cooking oil fume. Methods 108 subjects engaged in catering trade in Dongshan district of Guangzhou city were enrolled into this study by questionnaire investigation, serum MDA, SOD, activity of Lysozyme, micronucleus formation of periphery lymphocytes, blood lipids, blood routine indexes and vital capacity were determined. Results Compared with the control, serum MDA, micronucleus formation of periphery lymphocytes, CHOL, apoB LDL,WBC and mononuclear cells in the exposed group were significantly higher and a positive correlation was found between the levels of serum MDA, CHOL, apob, LDL, micronucleus formation of periphery lymphocyfes and length of service. Conclusion Cooking oil fume may injure oxidation-antioxidation system and have genetic toxity to human. The effect on lung function needs further study.

OBJECTIVE:To study the effect of Typhae pollen decoction on isolated uterine smooth muscle(USM)contraction of rats at postconceptual stage. METHODS:16 Wistar rats at postconceptual stage were selected and USM strips were isolated. T. pollen decoction 0(blank control),2,4,8 and 12 mg(medicinal material)/ml were added respectively;the effects of T. pollen de-coction on USM strips contraction were observed,and mean tension,duration of contraction and frequency were measured and re-corded. The effects of T. pollen decoction on USM strips contraction were investigated after pretreatment of prostaglandin synthase inhibitor indometacin(1×10-7 mol/ml)and calcium channel blocker verapamil(1×10-7 mol/ml);USM tension,duration of contrac-tion and frequency were measured and recorded. RESULTS:Compared with blank control group,T. pollen decoction 4,8 and 12 mg(medicinal material)/ml could increase USM tension,duration of contraction and frequency(P<0.05);after added verapamil and indometacin,T. pollen decoction decreased USM tension,shortened duration of contraction and decreased frequency (P<0.05). CONCLUSIONS:T. pollen decoction can strengthen USM strips contraction,and the effect is inhibited by prostaglandin syn-thase inhibitor and calcium channel blocker.

Objective:To explore whether cigarette smoking extract (CSE) has influence on fluorescence protein ex-pression of thrombomodulin (TM) on surface of African green monkey kidney fibroblast cells (COS-7) or not . Methods:When TM-green fluorescent protein (GFP) plasmid was successfully constructed ,COS-7 cells were trans-fected by it ,then incubated by prepared 5% CSE (5% CSE group) ,PBS of certain volume was added to serum-free minimal essential medium (MEM ,simple medium) ,which was cultured at the same time and treated as control group .Flow cytometry counting method was used to detect change of TM-GFP expression amount on COS-7 surface at different time point .Results:Compare with control group ,there were no significant difference in the expression of TM-GFP on COS-7 surface at 1h and 6h in 5% CSE group [1h :(134.99 ± 18.41) vs .(146.61 ± 12.06) ,6h :(116.89 ± 27.28) vs .(123.89 ± 39.24) ,P>0.05 both] .Conclusion:The 5% cigarette smoking extract has no influ-ence on fluorescence expression of thrombomodulin on surface of African green monkey kidney fibroblast cells .

Objectives To explore suitable conditions for establishing food allergy model through sensitization by in-traperitoneal injection (i.p) with low-dose ovalbumin (OVA) and challenge by gavage with high-dose OVA in SD young rats, and to evaluate the model. Methods Sixteen three-week-old female SD young rats were randomly divided into two groups with 8 rats each. SD young rats in food allergy (FA) group were ifrst sensitized by intraperitoneal injection with 0.2 ml suspension mixed with 40 μg OVA and 1mg Al(OH)3 on the ifrst day (d 0), then intraperitoneally injected with 0.2 ml (40 μg) OVA solution on days 2, 4, 7, 9 and 11, and lastly challenged by gavage with 2.0 ml (15 mg/ml) OVA solution on days 20, 24, 28 and 30. The rats in the control group were intraperitoneally injected and gavaged with the same volume of normal saline instead of OVA during the same period. The eosinophils (EOS), mast cells (MC), the integrity of MC in intestinal mucosa of two groups were observed, and ovalbumin speciifc IgE (OVA-IgE) levels in serum were analyzed. Results The rats in FA group had lusterless hair and diarrhea, and compared with control group, OVA-IgE levels were increased signiifcantly (P<0.05). Compared with control group, the intestinal mucosa of jejunum, ileum and colon in FA group had more damage, with more EOS and degranu-lated MC aggregated (P<0.01). Conclusions The allergy model established through sensitization by intraperitoneal injection with low-dose OVA mixed with adjuvant Al(OH)3 and challenge by gavage with high-dose OVA in young rats had clinical features and intestinal pathological changes consistent with food allergy infants and it was an ideal food allergy model in SD young rats.

Objective To study the cerebral energy metabolism changes of acute exacerbation of chronic obstructive pulmonary disease (AECOPD) through hydrogen magnetic resonance spectroscopy examination (1 HMRS ) and its relationship with partial pressure of oxygen / carbon dioxide tension.Methods Totally 13 cases of AECOPD patients and 10 cases of age-matched healthy people underwent HMRS examination.The ratios of n-acetyl-aspartate(NAA)/creatine(Cr),choline (Cho)/Cr,myo-inositol(MI)/Cr of parieto-temporal and occipital areas of brain were detected.Blood gas analysis were also used to detect partial pressure of oxygen (PaO2) and carbon dioxide (PaCO2).Results NAA / Cr of parieto-temporal and occipital areas of brain (1.32±0.12,1.48±0.12) were lower in AECOPD group than those in control group (1.45±0.11,1.58±0.10) (P＜ 0.05),MI/Cr (0.23±0.07,0.30±0.11) were also decreased compared with control group (0.40±0.14,0.46±0.12) (P＜ 0.01),while Cho/Cr of parieto -temporal and occipital areas of brain between the AECOPD group and control group showed no significant difference (P＞0.05).NAA/Cr of parieto temporal and occipital areas of brain were positively correlated with PaO2 (r=0.46 and 0.44),and MI/Cr of these areas of brain were also positively related with PaO2 (r=0.63 and 0.50),but MI / Cr of parieto tempora was negatively correlated with PaCO2 (r =- 0.472). Conclusions Cerebral metabolite changes may occur in AECOPD patients,and this has relationship with hypoxia and carbon dioxide retention.

Objective To investigate the effects of the free radical scavenger,edaravone,on patients undergoing cardiac valve replacement under cardiopulmonary bypass (CPB). Methods Thirty patients,including 7 males and 23 females,at a mean age of 41.4?10.4 (23 to 63),undergoing mitral or/and aortic valve replacement (MVR or AVR) under CPB from March to December 2009 in our hospital were subjected,and then divided into 2 matched groups by means of random number table,study group (n=14) and control group (n=16).Inclusion criteria: patients received valve replacement surgery under CPB; aging from 20 to 65; heart function: class Ⅰto Ⅲ; liver,kidney and lung function properly; blood gas and electrolyte properly. Exclude criteria: preoperatively used scavenger and the like; there was a history of cerebrovascular or neuropsychiatric symptoms; had a history of myocardial infarction or other coronary artery disease. In the intervention group,0.5 mg/kg of edaravone was diluted to 20 ml and introduced into CPB unit at the beginning,while the same dose of saline water was given in control group in the same way. Blood samples were collected from radial artery at following 5 time points,the beginning of CPB (T0),the end of CPB (T1),30 min (T2),6 h (T3),and 24 h (T4) after CPB. After the blood samples of all cases were collected,the serum level of hematocrit (HCT),malondialdehyde (MDA),inducible nitric oxide synthase (iNOS),cardiac troponin I (cTnI),creatine kinase-MB (CK-MB),myoglobin (Myo),S100 protein and neuron-specific enolase (NSE) was detected. Cardiac resuscitation and critically postoperative complications were observed. Results The level of HCT at T1-T3,cTnI at T4 was lower in study group than that in control (P