题目内容

罗先生，40岁。两天来阵发性脐周疼痛，恶心，伴频繁呕吐，有明显口渴，尿少。查体：脉搏 96次/分，血压 l00/70mmHg，轻度腹胀，见肠型，脐右侧有轻压痛，肠鸣音亢进。五年前曾行阑尾切除术。诊断为粘连性肠梗阻，采用禁食、胃肠减压、输液及应用抗生素等非手术治疗。停止胃肠减压最主要的指征是

A. 腹痛减轻
B. 腹胀解除
C. 呕吐停止
D. 肛门排气
E. 未见肠型

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