导致急性心肌梗死患者早期（24小时内）死亡的主要原因为（）

A.心功能不全

B.心源性休克

C.心律失常

D.心脏破裂

E.肺栓塞

Americans who consider themselves ________ in the traditional sense do not usually hesitate to heap criticism in domestic matters over what they believe is oppressive or wasteful.

A．pedestrian

B．penchant

C．patriarch

D．patriotic