He has made some spelling mistakes in the paper; ______, they are not serious.

A．but

B．therefore

C．even if

D．however

多用于抑郁症的药物是（）。

A.吩噻嗪类药物

B.抑制5-HT再摄取的药物

C.苯二氮类药物

D.锂盐

E.卡马西平