It is illegal for a public official to ask people for gifts or money _____ favors to them.

[      ]

A. in preference to

B. in place of

C. in agreement with

D. in exchange for

患者，女性，22岁，因右下第三磨牙低位埋伏阻生，要求拔除。

为减少出血，保持术野清晰，常在麻药中加入

A．肾上腺素

B．立止血

C．卡巴克络

D．酚磺乙胺

E．氨甲苯酸