防止蛛网膜下腔麻醉后头痛的措施包括

A．麻醉时采用细穿刺针，提高穿刺技术

B．避免反复穿刺，减少针刺裂孔

C．保证术后输入足量液体

D．常规去枕平卧6～8h可减轻麻醉后头痛

E．常规去枕平卧1～2h可减轻麻醉后头痛

I took ＿＿＿for granted that he would believe in us.

A．that

B．the thing

C．it

D．this