以下哪项超声表现与慢性肺栓塞无关（）。

A.下腔静脉腔内可见实质性回声充填

B.室间隔与左心室后壁呈同向运动

C.二尖瓣环扩大，三尖瓣关闭时见明显缝隙

D.肺动脉主干腔内彩色血流信号暗淡

E.右心室腔扩大，肌窦异常丰富，局都变薄

I usually do my homework _____than Mary. But she makes fewer mistakes because she is_____.

A．more quickly; more careful

B．more quickly; more carefully

C．much quicker; more careful

D．much quicker; more carefully