--- What makes you so happy today, Jack?

--- Because my teacher says I am __________ honest boy.

A．/

B．a

C．the

D．an

8周妊娠，难免流产，首选的治疗原则是（）

A.卧床保胎

B.尽快清宫

C.肌注催产素

D.给予止血药物

E.给予大量雌激素