缩窄性心包炎的特征性X线征象是（）。

A.心影近似三角形

B.两心缘僵直，分界不清，伴胸膜炎改变

C.心搏减弱、消失

D.上腔静脉扩张

E.心包壳状钙化

—You have made great progress recently.

—______.  

A．So has Ann

B．So Ann has

C．So she does

D．So does she