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.

女性，30岁，右下肢无力，上楼困难3月。检查：右大腿屈曲肌力3级，右大腿前部肌肉萎缩，肌张力减低，右膝腱反射消失，跟腱反射正常，无病理反射，右大腿前部有大片状痛觉明显减退区（）。

A.股神经损害

B.股外侧皮神经损害

C.腓总神经损害

D.髂腹股沟神经损害

E.闭孔神经损害