患者,男,60岁。半个月前,因食生冷瓜果后出现呃逆。现病人呃声低长无力,气怯声低,泛吐清水,脘腹不适,喜温喜按,手足不温,便溏,舌淡苔白,脉细弱。若兼嗳腐吞酸,腹胀,苔腻。宜加() ["A.保和丸","神曲、麦芽","左金丸","乌贼骨、瓦楞子","木香、陈皮"]
试述心脏骤停(cardiac arrest)的定义。
出现膈下游离气体的原因是() ["人工气腹","手术后腹腔残留气体","产气菌引起的急性腹膜炎","胃肠道穿孔","以上都是"]
依据茎的分枝规律,在对果树进行倍剪时.应控制其为()。 ["A、单独分枝形式","B、合轴分枝形式","C、二叉分枝形式","D、假二叉分枝形式"]
溃疡型食管癌的典型表现是() ["牵引性憩室","食管节段性环行狭窄","食管内充盈缺损","龛影","食管全程扩张,末端呈鼠尾状"]
何谓临床死亡?