男,50岁。既往乙型肝炎病史二十余年,今晨突然发生呕血,色鲜红,量约1500ml,急至医院就诊。查体:BP80/50mmHg,P106次/分,面色苍白,四肢末梢凉,脾于肋缘下5.Ocm,移动浊音(+),腹壁可见静脉曲张。至医院后患者又呕血一次,量约300ml。患者出血原因最可能是()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧