关于二尖瓣狭窄二维超声心动图特征的描述，错误的是（）。

A.二尖瓣前后叶增厚、回声增强

B.瓣膜交界处粘连、融合，瓣膜变形

C.瓣膜活动幅度减低，瓣口变小

D.二尖瓣前叶于收缩期呈气球样向左心室突出

E.严重病变瓣膜可呈不规则的团块或条索状

I realize she can be very troublesome, but ______I think you should apologize for being so angry with her.

A．all the same

B．once in a while

C．in actual fact

D．all the time