What day is it today? [ ]
A. It's Monday.
B. It's Saturday.
C. It's Sunday.
答案:C
男孩,4岁,消瘦,"X"形腿,肋骨呈串珠状,"鸡胸",头颅略方,体重偏低,X线检查提示:骨质疏松,掌、腕骨愈合缓慢。
可初步诊断为 ()
A.佝偻病
B.脚气病
C.缺铁症
D.缺锰症
E.缺锌症