【单选题】【消耗次数：1】
下面哪项是RIFLE 标准的损伤期?
①
肌酐升高 x 1.5 或GFR降低 >25%
②
肌酐升高 x 2 或GFR降低 >50%
③
UO <0.5ml/kg/hr x 6 小时
④
肌酐升高 x 3 或GFR降低 >75%
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