— Do you have anything to say for yourselves? 

— Yes, there is one point ____ you must insist on.[ ]

A. why

B. where

C. how

D. /

临床情景：患儿，男性，11岁。头痛、发热3天，伴有喷射状呕吐。急诊室初步诊断为急性脑膜炎。需作脑脊液检查。要求：请为患儿行腰椎穿刺并测脑脊液压力。