he has been working so hard . __________ he could answer such a difficult question.

A．No wander

B．No wonder

C．why

D．because

女性，32岁，进行性膀胱刺激症状，经抗生素治疗不见好转，且伴有右侧腰部胀痛及午后潮热。

尿液检查对诊断有决定性意义的是

A．血尿

B．脓尿

C．尿普通细菌培养

D．尿沉渣找结核杆菌

E．尿细胞学检查