I didn’t like the color of the coat my mother bought me, so she went back to _______ it for another one.

A．replace

B．exchange

C．afford

D．measure

可先采用按摩和局部抗生素滴眼等保守治疗1～2周后无效可行泪道探通的病为（）

A.泪小点完全膜闭

B.泪点缺如

C.鼻泪管阻塞

D.先天性泪囊膨出

E.泪点和泪管完全缺如