— Where is my notebook?

— I don't know. It isn't here. Maybe             took it away by mistake. [ ]

A. everybody

B. nobody

C. anybody

D. somebody

9个月小儿，身高80cm，体重15kg，每天户外活动2～3小时，近日出现多汗、烦躁、夜惊，查体：枕秃，轻度肋缘外翻。该患儿患佝偻病的可能原因是（）

A.未补钙

B.未加辅食

C.生长过速

D.未补充鱼肝油

E.患有某些疾病