患者,男性,55岁,口舌干燥。查体:皮肤弹性差,眼窝凹陷,尿比重1.02g,血清钠浓度为157mmol/L,应首先补充( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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