— John, clean your room today. Remember our deal!

— I know that, but I have other plans.

— ________ [ ]

A. That's a good idea.  

B. There is no excuse!

C. Have a nice time.  

D. Mind your own business.

可作为二尖瓣分离术适应证的重要参考条件的是（）

A.S增强

B.可见负性心尖搏动

C.心界向左增大

D.可闻及开瓣音

E.心尖部可触及舒张期震颤