—Would you mind if I turned off the air conditioner?

—________ It makes no difference to me.

A．Never mind.

B．Sure，go ahead.

C．Not at all.

D．Why not?

关于清创术的说法正确的是

A．于外伤后6～8小时内清创为宜

B．于外伤后8～12小时内清创为宜

C．于外伤后12～24小时内清创为宜

D．于外伤后24～30小时内清创为宜

E．于外伤后24～48小时内清创为宜于外伤后48～72小时内清创为宜