— What a mess! Daniel, would you please        your school things?

— Sure, mum.

A．put up

B．put on

C．put out

D．put away

下图是传染病的预防措施，其中属于保护易感人群的是

A．隔离病人

B．打扫卫生

C．喷洒消毒液

D．接种疫苗