OBJECTIVE:To advocate the necessity of carrying out drug policy research in our country.METHODS:The concepts,contents,subject characteristics of drug policy and it trend of development were analyzed by transplanting the method of the public policy subject.RESULTS&CONCLUSIONS:It is of very great significance to carry out the study of drug policy,for it can not only improve the formulation system of drug policy but also provide valid theory and methods for the improvement to the quality of drug policy in our country.

OBJECTIVE:To divided the attribute of drug and to promote the study of pharmaceutical policy.METHODS:Through adopt the methods of deductive,to analyze the character of drug,then divided the attribute of drug.RESULTS&CONCLUSIONS:Thinking the attribute of drug is complicated,with considering it’s fairness,consumption feature of drug and external feature of disease,it could divide into three kinds,private product,common resource and public product.

OBJECTIVE:To provide reference material for improving the competitive capacity of pharmaceutical enter?prises in China.METHODS:Using the general principle of internationized management theory,the present situation,superiority and inferiority of China's pharmaceutical enterprises in management were analysed,and the strategy of internationized man?agement was put forward.RESULTS&CONCLUSION:China's pharmaceutical enterprises are facing opportunity and chal?lenge,only through rational,large-scaled,concentrated and internationized management can their market competitive power be raised.

Objective To discuss the effects and influence of preoperative and postoperative adjunctive intravitreal conbercept in 23G vitrectomy for proliferative diabetic retinopathy (PDR).Methods A retrospective research was performed on 42 PDR eyes from January 2015 to February 2016 in the Second Affiliated Hospital of Nanchang University,who received either intravitreal 0.05 mL conbercept injection 7 days before 23G vitrectomy (group A,n =22) or intravitreal 0.05 mL conbercept injection at the end of 23 G vitrectomy (group B,n =20).The operative time,postoperative vitreous hemorrhage (VH),intraoperative and postoperative other differences of clinical indicators and postoperative best-corrected visual acuity (BCVA) between the two groups were compared.Results The average operation time,intraoperative electric coagulation hemostasis rate,iatrogenic hiatal incidence and intraoperative hemorrhage rate of group A were lower than those of group B (all P ＜ 0.05).BCVA at 6 months after surgery did not differ significantly between two groups (P ＞ 0.05),but the difference was statistically significant between pre-operation and post-operation (P ＜ 0.05).The incidences of early (≤ 1 month) postoperative VH were 18.2％ (4 eyes) and 15.0％ (3 eyes) in group A and B,respectively (P ＞ 0.05).The incidences of later (＞ 1 month) postoperative VH were 27.3％ (6 eyes) and 0 in group A and B,respectively,the difference was statistically significant (P ＜0.05).The percentages of reoperation were 13.6％ (3eyes with postoperative VH) and 10.0％ (2 eyes with traction retinal detachment) respectively in group A and B.The average times of supplementary laser photocoagulation were (2.3 ± 1.0) times and (1.4 ±0.6) times in group A and B,respectively in follow-up period (P ＜ 0.05).Conclusion The adjunctive use of intraoperative intravitreal injection of conbercept can prevent effectively postoperative VH and decrease conveniently the time of supplementary laser photocoagulation in 23G vitrectomy for PDR,as well as the preoperative adjunctive use can decrease the operation time,intraoperative complications and incidences of early postoperative VH.

Enteral nutrition plays an irreplaceable role in the nutritional treatment of critically ill patients. In order to help clinical medical staff to manage the common complications during the implementations of enteral nutrition for critically ill patients, the consensus writing team carried out literature retrieval, literature quality evaluation, evidence synthesis. Several topics such as diarrhea, aspiration, high gastric residual volume, abdominal distension, etc. were assessed by evidence-based methodology and Delphi method. After two rounds of expert investigations, Expert consensus on prevention and management of enteral nutrition therapy complications for critically ill patients in China (2021 edition) developed, and provided guidance for clinical medical staff.