[名词解释] 麦氏点

肠梗阻非手术治疗期间，观察到哪些情况表明有绞窄的可能? 转移性右下腹痛 肠套叠 阑尾炎穿孔()绞窄性肠梗阻() ["A．腹穿抽出血性渗液，恶臭味","B．腹穿抽出脓液","C．腹穿抽出胆汁","D．腹穿抽出粪样液","E．腹穿抽出血液"] 直肠癌为()肠套叠为() ["A．黏液血便","B．果酱样便","C．腹泻、便血(腥臭血便)","D．腹泻、大量出血","E．鲜血便"] 麦氏点