John couldn’t take part in the activity held at the cultural center yesterday for _____ reasons.

A．series of

B．all kinds

C．the number of

D．a variety of

与亚急性甲状腺炎发病有关的是（）

A.TSAb

B.TBII

C.TGI

D.结肠炎耶尔森菌

E.病毒感染