Excuse me. Is there a post office near here?

A．over there

B．in the neighborhood

C．across from us

D．in the front

中年女性患者，尿频、尿痛、尿急3个月余，伴尿液混浊，一般抗菌药物治疗无效，下一步应先做哪项检查（）

A.CT

B.排泄性肾盂造影

C.膀胱镜检查

D.逆行肾盂造影

E.膀胱造影