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当前学科：中西医结合内科综合练习
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患者，男，30岁。运动后口渴大量持续饮水，表现为疲倦、表情淡漠、恶心、食欲减退，考虑为运动后疲劳所致，第3天出现头痛、嗜睡、神志错乱、谵妄等神经精神症状。家人送到医院急诊。血浆渗透压234mOsm/（kg·H
2
O），血钠112mmol／L。脑电图、脑血流图、CT检查未见异常。应考虑的诊断是（）
A . 急性水过多及水中毒
B . 中毒
C . 慢性水过多及水中毒
D . 蛛网膜下腔出血
E . 代谢性酸中毒
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