– At first he was not good at playing basketball but after a long time of training hard, he stood out.

– It’s easy to understand, ____________________.

A．Make hay while the sun shines.

B．Practice makes perfect.

C．The early bird catches the worm

D．Actions speak louder than words.

病原体侵入血流，在血中繁殖产生毒素，表现出严重的中毒症状，应考虑（）

A.毒血症

B.菌血症

C.败血症

D.脓毒血症

E.变应性亚败血症