Don't read _______ bed. It's bad _______ your eyes. [ ]

A．in, to

B．in, for

C．at, for

D．at, to

引起佝偻病最常见的病因是（）。

A.生长发育过速

B.摄入不足

C.慢性腹泻

D.母乳摄入少

E.日光照射不足