女性，21岁。反复尿频、尿急、尿痛2年，加重伴肉眼血尿、发热2天。

以下检查不提示上尿路感染的是（）.

A.尿细菌培养阳性

B.尿抗体包裹细菌

C.尿NAG酶升高

D.尿液视黄醇结合蛋白

E.Tamm-Horsfall蛋白

I have experienced quite a number of cases ______ I really wanted to help but could not have anything to ______.

A．when; put on my hands

B．that; put my hands on

C．where; put my hands on

D．in that; put on my hands