以下哪项处理不利于预防术后肺不张

A．术前2周停止吸烟

B．增加术后运动与咳嗽

C．术前呼吸锻炼

D．术后腹部切口捆扎腹带

E．纤维支气管镜吸痰

--- Alice looks sad. Did you tell her about her brother’s accident?

--- Sorry, I ________ her just before her final exams.

A．can’t tell

B．mustn’t have told

C．needn’t tell

D．shouldn’t have told