He was beaten by his father because of being naughty. ____________, he became silent.[ ]

A. Since

B. Since then on

C. From that time on

D. From since on

可观察到胰头病变的是（）

A.十二指肠肠圈

B.十二指肠降部

C.十二指肠水平部

D.十二指肠升部

E.十二指肠球部