[名词解释] 脓胸

低渗性缺水的症状时不出现下列哪种() ["A．直立性晕倒","B．疲乏、头晕","C．手足麻木","D．血压下降","E．常有口渴"] 心脏手术后出现少尿或无尿的原因? 在纠正酮体酸中毒时，血浆K低于多少就需要补K() ["A．3.5mmol/L","B．4.0mmol/L","C．4.5mmol/L","D．5.0mmol/L","E．5.5mmol/L"] 体外循环 房间隔缺损 脓胸