Objective To investigate the training and requirements of first aid skills among medical officers onboard naval vessels .Methods An investigation was made on the first aid skills of 56 naval afloat medical officers from a certain naval detachment , who took part in the first aid training , and a statistical analysis was made accordingly .Results A total of 56 effective questionnaires were recovered .Analysis revealed that the medical officers onboard the naval vessels were lacking in the skills of cardiopulmonary resus -citation, the establishment of venous access , invasive diagnosis and treatment techniques , the application of first aid , etc.Conclusion Most naval afloat medical officers were insufficient in the training of comprehensive first aid skills , and they had urgent demands for further training on first aid skills .

Objective To study the human telomerase reverse transcriptase (hTERT) and spleen tyrosine kinase (SYK) activity expression and molecular margin in the tumor center and peripheral tissues of patients with colorectal cancer, and to explore the security of tumor surgical margins. Methods The expressions of hTERT and SYK were examined by SABC and Supervisan immunohistochemistry in 20 specimens of colorectal cancer and tissues 1 cm, 2 cm, 3 cm, 4 cm and 5 cm, away from proximal and distal margin of the tumor respectively. Results The positive expression rate of hTERT in colorectal cancer was 80.00 %, the rate in tissues 3 cm, 4 cm and 5 cm away from the tumor margin was 0. The positive expression rate of hTERT in tissues from the cancer center to 3 cm away from the tumor margin was gradually diminishing (P<0.01). The positive expression rate of SYK in colorectal cancer was 10.00 %, the positive expression rate of SYK in tissues from the cancer center to 3 cm away from the tumor margin was gradually increased (P<0.05). Conclusion There is molecular margin around colorectal cancer tissues. Considering hTERT and SYK expressions, 3 cm can be defined as the safe molecular margin for the radical operation of colorectal cancer.