病历摘要：患者女性，83岁，活动后气促10天，伴心悸、咳嗽，咳少许白粘痰，感左侧胸痛，呈压榨样，与呼吸有关，但无放射痛，并发热，体温最高37.9℃，无明显规律性，无咯血、畏寒等。既往有系统性红斑狼疮病史，有吸烟史20年，已经戒烟20年。1月前始自觉双下肢易疲劳，但活动不受限。体查：T37.7℃，左肺可闻及啸鸣音和少许细湿啰音，心率123bpm，律齐，P2>A2，未闻及杂音。双下肢无水肿。

提示：双下肢静脉超声见双下肢静脉血栓形成。肺血栓栓塞症的血栓大部分来源于何处？（）

A.上腔静脉

B.右心腔

C.下肢近端深静脉

D.盆腔静脉

E.颈内静脉

F.锁骨下静脉

Which of the following is TRUE about the man

A．He didn’t suspect that she already knew his past.

B．He realized that she knew very few about him.

C．He suspected her because she knew almost everything.

D．He suspected her past.