All experts agree that the most important consideration with diet drugs is carefully ­­___       the risks and benefits .

A．weighing

B．checking

C．taking

D．supposing

计算机信息网络系统，是指由计算机及其相关设备（含网络）构成的、按照一定的应用目标和规则对信息进行（）等处理的人机系统。

A.采集

B.加工和储存

C.检索

D.传输