After striking his head on a tree while fa
题型：单项选择题
问题：
After striking his head on a tree while falling from a ladder, a young man is admitted to the emergency department. He’s unconscious and his pupils are nonreactive. Which intervention would be the most dangerous for the client（）
A. Give him a barbiturate.
B. Place him on mechanical ventilation.
C. Perform a lumbar puncture.
D. Elevate the head of his bed.