多选题:诊断原发性干燥综合征的肾小管酸中毒需要具备下列条件中的(  )

题目内容:
诊断原发性干燥综合征的肾小管酸中毒需要具备下列条件中的(  ) A.血pH<7.5
B.尿pH≥7.0
C.C02结合力下降
D.血氧饱和度下降
E.尿比重下降固定
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