It is no use _________ to persuade him ________ smoking because he has been addicted to it since he was young.

A．trying, to quit

B．to try, to quit

C．to try, quit

D．trying, quit

患者男，40岁。5年前开始经常心悸发作，最近发作频繁，持续时间较前延长，药物治疗效果不佳。心电图显示心律齐，QRS波形增宽，起始部有δ波。

体检时可能发现（）

A.BP180／100mmHg

B.心尖部4／6级收缩期杂音

C.甲状腺增大

D.心脏彩超示舒张期左房内径49mm

E.胸片示心胸比值62%