患者，女性，45岁，拟行胆囊切除术，护士向其做术前指导时，告诉患者术前常规禁食的时间不得少于（）

A.4小时

B.6小时

C.8小时

D.10小时

E.12小时

When you make a decision to buy something, you must remember that a good name of a product

doesn't           mean good quality of it. [ ]

A. necessarily

B. simply

C. essentially

D. purposefully