[名词解释] 肠息肉病

绞窄性肠梗阻的诊断要点有哪些? 术中如何判断绞窄性肠梗阻肠管的生机?如有可疑应如何处理? Sheehan综合征最常见的原因是() ["A．垂体肿瘤","B．脑肿瘤","C．脑外伤","D．分娩时大出血","E．长期接受类固醇激素的治疗"] 短肠综合征 便潜血阳性，消化道出血至少达()出现柏油样便，消化道出血至少达() ["A．5ml","B．10ml","C．50ml","D．200ml","E．400ml"] 肠息肉病