雷诺现象或雷诺病发病的病理生理机制为()
A.手指足趾小动脉间隙性痉挛
B.末梢细小动脉对寒冷反应性痉挛
C.淋巴水肿
D.静脉痉挛导致淤血
E.小动脉扩张
参考答案:A
There’s not any beer left and the bar is shut so we’ll have to _______.
A.go out
B.go off
C.go without
D.go through