I try to avoid ________ on Saturdays because the stores are usually crowded and I can’t help ______ something I don’t really need.

A．to go shopping; buying

B．going shopping; to buy

C．going shopping; buying

D．to go shoping; to buy

以单位体表面积计算的心排出量称为（）。

A.心脏指数

B.每搏量

C.心排出量

D.射血分数

E.体表面积