One reason Crystal has become so famous is that he is very quick thinking, and is often able to  _____ new jokes about the people and things around him.

A．come up with

B．come across

C．come up

D．come to

县级以上人民政府有关部门根据统计任务的需要设立统计机构，或者在有关机构中设置统计人员，并指定统计负责人。 ( )