—Why! I have nothing to write about. _______ that you want me to say?

—Your summary for this term and holiday schedule.

A．What is it

B．What it is

C．What are they

D．What they are

患者，女性，28岁，患甲状腺功能亢进症。入院时体温37℃。脉搏101次/min，血压130/70mmHg，拟行双侧甲状腺次全切除术。术前按常规服碘剂。

患者术前服用碘剂的目的是（）。

A.抑制甲状腺素分泌

B.抑制甲状腺素释放

C.减慢心率

D.增加体重

E.稳定情绪