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在解剖学上，大肠属于比较单纯的脏器，除直肠、肛门具有排便功能外，主要功能为吸收水分。因而目前大肠癌的外科治疗，除复发病例外不太困难，与上消化道癌相比，大多易于施行根治手术，预后亦良好。随着抗菌素的开发和手术前、后输液及营养补充的迅速进步，同时由于气管内麻?
In terms of anatomy, the large intestine is a relatively simple organ, except that the rectum and anus have defecation function, and the main function is to absorb water. Therefore, the current surgical treatment of colorectal cancer is not difficult except for recurrent cases. Compared with upper gastrointestinal cancer, most of them are easy to perform radical surgery and have a good prognosis. With the development of antibiotics and the rapid advancement of infusion and nutritional supplementation before and after surgery, as well as due to intratracheal anesthesia?