To everyone's surprise , Alex __________ play chess very well when he was only four.                                                                                                                                                        [ ]

A. might

B. should        

C. would、

D. could

足月顺产男婴，生后26d，发热，吃奶少，大便稍稀1d来诊，其母患感冒2d。体检：精神差，呼吸略促，咽赤不明显，皮肤轻度黄染，心肺听诊无异常，脐轮略红肿，脐部有少许分泌物，肝肋下3.5cm，前囟平，颈软，血WBC4.2×10/L，中性粒细胞74％，大便镜检WBC2～4个/HP。

如果该患儿患化脓性脑膜炎，病史或体格检查中最有助诊断的是（）

A.抽搐

B.拒食

C.呕吐

D.前囟紧张

E.高热