My grandpa is a science teacher and he_____ science. [ ]

A. is good to

B. is good for

C. does good to

D. is good at

一位因甲状腺肿就诊的病人，临床有轻度甲低表现，血浆FT3，FT4均高，TSH值高，应当首先考虑的诊断是

A．Graves病
B．继发性甲亢
C．外周组织对T3，T4抵抗
D．TSH的受体或受体后缺陷
E．原发性甲低