题目内容

某患者因外伤急性失血,血压降至70/30mmHg,尿量明显减少,尿量减少的原因主要是( )

A. 肾小球毛细血管血压下降
B. 肾小球滤过面积减小
C. 血浆胶体渗透压升高
D. 血浆晶体渗透压降低

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