急性下消化道出血黄筵庭，严仲瑜下消化道泛指包括远侧小肠和盲肠至直肠末端一段大肠在内的肠道而言，近远侧小肠也很难以空肠回肠划界，因并无很大的临床意义，而最常见的内痔出血，一般不列入引起急性下消化道出血的病变之内。下消化道慢性少量出血井下少见，而急性出血... Acute lower gastrointestinal bleeding Banquet, Yan Zhongyu Lower gastrointestinal tract, including the distal intestine and cecum to the distal rectum, a large intestine, including the intestinal tract, the proximal and distal small intestine is also difficult to demarcate the jejunum, because there is no very Large clinical significance, and the most common hemorrhoids hemorrhage, are generally not included in the lesions caused by acute lower gastrointestinal bleeding within. Chronic small bleeding in the lower gastrointestinal tract rare, but acute bleeding ...