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。
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。
Objective: To explore the anatomical characteristics and the methods to prevent injuries of ureter in laparoscopic total mesorectal excision(LTME).
目的探讨全直肠系膜切除（ TME）加双吻合器（D ST）在低位直肠癌手术中的应用效果。
Objective To determine the effect of total mesorectal excision(TME)with double stapling Technique(DST)in lower rectal carcinoma.
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