We sometimes have to meet some difficulties, but we should develop a good attitude _______ life.

A．in

B．on

C．at

D．to

区别血尿与血红蛋白尿的主要方法是（）。

A.观察血尿颜色

B.做尿胆原测验

C.做尿隐血试验

D.做尿三杯试验

E.做尿沉渣镜检