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【单选题】
某患者急性外伤失血,血压降至70/30mmHg,尿量明显减少,其尿量减少的原因主要是A.
血浆晶体渗透压降低
B.
血浆胶体渗透压升高
C.
肾小球毛细血管血压下降
D.
肾小球滤过面积减少
E.
滤过膜通透性降低
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A.
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B.
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