【单选题】
低渗性脱水，主要是___
A. 血钾低
B. 血钠低
C. 血钙低
D. 血镁低
E. 血糖低
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答案
B
解析
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10个月患儿，面黄来诊。诊断为营养性巨幼红细胞贫血，下列处理正确的是___
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