孕妇，34岁，初次怀孕。孕16周出现心悸、气短，经过增加产前检查次数，严密监测孕期经过等，目前孕37周，自然临产。

该产妇在分娩期应注意的问题中，描述错误的是（）。

A.常规吸氧

B.胎盘娩出后，腹部放置10kg沙袋

C.注意保暖

D.注意补充营养

E.采取产钳助产

When action to avoid a close quarter situation is taken,a course change alone may be the most effective action provide that（）.

A.it is done in a succession of small course changes

B.It is not done too early

C.It is a large course change

D.the course change is to starboard