鉴别水肿型和出血坏死型急性胰腺炎，下列意义不大的是（）。

A.血清淀粉酶增高

B.血钙降低

C.血清正铁血红蛋白阳性

D.胁腹部及脐周皮肤出现紫色淤斑

E.发病后很快出现休克

— What’s the matter with John? He has been sitting there for hours.

— A postcard from his father_______ an attack of home-sickness in him.

A．took up

B．set off

C．brought in

D．built up