________ can make people healthy.

A．Doing more exercise

B．Watching TV too much

C．Going to school without breakfast

D．Going to bed too late at night

关于肾损伤的叙述正确的是

A．开放性较闭合性多见

B．闭合性较开放性多见

C．血尿的程度与肾损伤的程度成正比

D．血尿的程度与肾周围血肿的程度成反比

E．多采取手术治疗