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当前学科：男性生殖及泌尿系统
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男性，15岁，少尿、水肿5天，咳嗽气短不能平卧1天，起病前2周喉痛3天，血压170／110mmHg，端坐呼吸，两肺底有散在湿啰音，尿比重1．022，尿蛋白（+++），红细胞30～90个／HP，血清补体C3降低。对该患者采取血液透析的主要目的是（）
A . A.脱水
B . 纠正酸中毒
C . 清除血肌酐
D . 清除血清免疫复合物
E . 降低血压
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