I prefer taking exercise in my spare time ＿＿ healthy.

A．to keep

B．to keeping

C．rather than keeping

D．rather than keep

对诊断功能亢进性甲状腺腺瘤有意义的是

A．弥漫性甲状腺肿大伴有血管杂音
B．弥漫性甲状腺肿大伴有触痛
C．甲状腺肿大质硬，表面光滑
D．放射性核素扫描为热结节
E．放射性核素扫描为冷结节