He slipped and broke his leg. _________, he will have to be away from school for two or three months.

A．On the contrary

B．In a word

C．In a way

D．As a result

肾旋转异常的影像学特征性表现是（）

A.肾盂积水

B.肾结石

C.肾门的朝向异常

D.肾的位置异常

E.输尿管扩张