重金属检查时：中药制剂中重金属检查常采用（）。

A.硫代乙酰胺法

B.第二法

C.硫化钠法

D.微孔滤膜法

E.第五法

Tom was so wild about computer games that he would stay online for ten hours _____every day.

A．in the end

B．in particular

C．on end

D．on purpose