上消化道出血最常见的病因是（） ["肝硬化","肝癌","消化性溃疡","胃癌","食管贲门黏膜撕裂"]
易引起白细胞减少的抗心律失常药物是（） ["苯妥英钠","胺碘酮","奎尼丁","美西律","异丙肾上腺素"]
椎管内肿瘤最常见的发病部位为（） ["颈段","胸段","腰段","骶段","尾段"]
下列各项，肝昏迷患者饮食应是（） ["高蛋白饮食","低盐饮食","低脂饮食","限制蛋白饮食","限制糖饮食"]
下列不属于肠道正常菌群的细菌是（） ["双歧杆菌","产气肠杆菌","大肠埃希菌","粪肠球菌","霍乱弧菌"]
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