PNH可并发（）。

A.巨幼红细胞性贫血

B.再生障碍性贫血

C.缺铁性贫血

D.门静脉血栓

E.DIC

--- Students should try to do a little studying every evening throughout the term, rather than study all night during the week before the exam.

--- Exactly. ____________.

A．Practice makes perfect

B．The early bird catches the worm

C．Slow but sure wins the race

D．Delays are dangerous