It is the protection for the trees___________ really  matters, rather than how many trees are planted.

A．what

B．that

C．不填

D．which

抑郁症与心境恶劣障碍的主要区别在于（）

A.兴趣下降

B.睡眠障碍

C.记忆力差、精力不足

D.精神运动性抑制

E.悲观厌世