The nurse is providing care for a pregnant client. The client asks the nurse how she can best deal with her fatigue. The nurse should instruct her to（）

A. take sleeping pills for a restful night’s sleep.

B. try to get more rest by going to bed earlier.

C. take her prenatal vitamins.

D. tell her not to worry because the fatigue will go away soon.

由于科学技术的进步导致了一部分剩余劳动力的失业，通常被称为( )。

A．经济性失业

B．社会性失业

C．结构性失业

D．季节性失业