Mr White, along with his assistants, () on the project day and night to meet the deadline.

A．work

B．working

C．is working

D．are working

感染性腹泻患者应用小檗碱+鞣酸蛋白属于（　）

A．超剂量用药

B．非适应证用药

C．有目的联合用药

D．超适应证用药

E．过度治疗用药