I think it unwise to live ______ one’s income, as is the case with a lot of young people today, who often turn to their parents for help.

A．beyond

B．within

C．outside

D．over

医院的基本功能有()

A．医疗工作

B．教学工作

C．预防和社区卫生服务

D．科研工作

E．保健工作