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当前学科：糖尿病
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女性，58岁。2型糖尿病15年，长期口服格列本脲10mg/d。查体：血压145/90mmHg，心、肺和腹部检查未见异常，双下肢无水肿。眼底检查：视网膜病变Ⅲ期。空腹血糖6.8mmol／L，餐后2h血糖10.6mmol／L，血尿素氮6.2mmol／L，血肌酐92.5mmol／L。尿常规检查尿糖50mmol／L，蛋白阴性。经检查为糖尿病早期肾病，治疗应首选（）
A . A.利尿剂
B . 血管紧张素转换酶抑制剂
C . α受体阻滞剂
D . β受体阻滞剂
E . 钙通道阻滞剂
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