As far as many parents are concerned, what a child should do，________， is to do well in his studies.[ ]

A．in all  

B．above all

C．after all  

D．at all

丘脑的非特异性投射系统的主要作用是

A．使机体进入睡眠状态

B．引起触觉

C．维持大脑皮质的兴奋状态

D．引起痛觉

E．引起温度觉