— I was told that an accident happened some day last month. Could you tell me where and when exactly?

— I'm sorry I can't remember when ______ accident happened. I only remember it was _____ Saturday

     morning, when it was snowing.[ ]

A. the, the

B. the, a

C. a, a

D. a, the

简述腹腔镜检查术后护理要点。