passion, people won't have the motivation or the joy necessary for creative thinking.

A．For .

B．Without

C．Beneath

D．By

HbF含量增高见于（）

A.β珠蛋白合成障碍性贫血

B.缺铁性贫血

C.遗传性球形细胞增多症

D.冷凝集素综合征

E.HbS病