When starting CPR on a drowning victim，you
题型：单项选择题
问题：
When starting CPR on a drowning victim，you should（）.
A.start chest compressions before the victim is removed from the water
B.drain water from the lungs before ventilating
C.begin mouth-to-mouth ventilations as soon as possible
D.do not tilt the head back since it may cause vomiting