—Look！Here comes the bus and I have to go now. Thank you for coming to see me off.

—Goodbye，and______！  

A．congratulations

B．all the best

C．cheer up

D．go ahead

病案号分派的两种主要方式是（）.

A.随机分派，集中分派

B.集中分派，分散分派

C.指定分派，分散分派

D.自动分派，集中分派

E.随机分派自动分派