–I _______ as the manager in this company.

–May I know since when?

A．worked

B．had worked

C．have worked

D．am working

患者，男，23岁。肢体小关节周围疼痛，酸胀，部位不局限，疼痛部位属于（）

A.急性痛

B.中心痛

C.慢性痛

D.浅表痛

E.深部痛