Much to his _____, his father was not angry at the result of the examination.

A．surprised

B．exciting

C．surprise

D．excited

患者女性，30岁，因颈部包块逐渐增大，气促而入院手术，术中见包块呈囊状，与舌根部盲孔相通。术后巨检囊内含清亮液体，囊壁厚0.1cm。镜检如图所示，最可能的诊断是()

A．结节性甲状腺肿囊性变

B．甲状舌管囊肿

C．鳃裂囊肿

D．单纯性甲状腺肿

E．舌黏液囊肿