Annie wasn’t at school today because she had to stay at home to ________ her mother.

A．look after

B．look at

C．look up

D．look for

十六大提出的正确处理公平与效率关系的指导方针是( )。

A．效率优先，注重公平

B．效率第一，公平第二

C．效率与公平并重

D．初次分配注重效率，再分配注重公平