Couinaud分段法的基础是以下哪项（）
A.肝动脉，胆道
B.门静脉，肝静脉
C.肝静脉，肝动脉
D.门静脉，胆道
E.以上都不对
参考答案：B
机房地面高低不平，高低相差大于（）m，应在高侧设置护栏。
A.0.3
B.0.5
C.0.75
D.1.0
— Did Linda have a good time in Beijing?
— Yes. She enjoyed ______ very much. [ ]
A．itself
B．them
C．herself
D．her
