In fact, more and more people ____ to live a greener, healthier and more environmentally “green life”.

A．chose

B．choose

C．are choosing

D．have chosen

患者，男，54岁，述胸骨后撕裂样疼痛，体检左上肢脉搏减弱。伴咳嗽，胸闷，呼吸困难。轻度头晕。发病前提重物史。胸部后前位X线片如下图：

应首先考虑（）

A.主动脉硬化

B.主动脉瓣狭窄

C.高血压性心脏病

D.二尖瓣脱垂

E.主动脉夹层动脉瘤

F.纵隔型肺癌