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婴儿腹泻易发生脱水的原因是()

单选题
2022-06-23 03:33
A、A.体液少
B、B.呕吐
C、C.消化酶分泌少
D、D.水代谢旺盛
E、E.免疫功能差
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正确答案
D

试题解析
因小儿生长发育快,活动量大、机体新陈代谢旺盛,摄入热量、蛋白质和经肾排出的溶液量均较高,体表面积大、呼吸频率快使不显性失水较成人多,所以儿童水的需要量大、交换率快,婴儿每天摄入和排出的水鞋占细胞外液量的1/2,而成人则为1/7.故婴儿发生水代谢紊乱时易发生脱水。

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