An 8-month-old boy is admitted to the pediatric unit following a fall from his high chair. The child is awake, alert, and crying. The nurse should know that a brain injury is more severe in children because of

A. increased myelination.
B. intracranial hypotension.
C. cerebral hyperemia.
D. a slightly thicker cranium.

人工成本结构指标反映了（）。

A.企业员工均收入的高低

B.企业人工成本的构成情况及其合理性

C.企业的劳动生产率

D.一定时期内企业人工成本的变动幅度