1·Objective To investigate the preventive effect of total mesorectal excision (TME) on local recurrence of rectal cancer after operation, and the complications related to TME.
目的探讨全直肠系膜切除术在预防直肠癌术后局部复发中的作用，以及同该操作相关的一些并发症。
2·Objective: To explore the anatomical characteristics and the methods to prevent injuries of ureter in laparoscopic total mesorectal excision(LTME).
目的：探讨与腹腔镜全直肠系膜切除术（LTME）有关的左输尿管解剖学特点和保护方法。