Though it was late, _____ he went on with his work. [ ]

A. but

B. and

C. so

D. \

在景点导游服务过程中，地陪应做到( )。

A．动静结合

B．导和游结合

C．适当集中和分散相结合

D．快慢结合

E．劳逸结合