对尿路感染具有确诊意义的检查是（）。

A.尿常规

B.24小时尿蛋白定量

C.尿培养和菌落计数

D.肾盂造影

E.尿酮体检查

We’ll have to finish it , _____________.

A．however it takes long

B．however long it takes

C．no matter how it takes

D．no matter how long does it take