题目内容

女孩，2岁，不会独站，不会说话，身矮，眼距宽，眼裂小，鼻梁低，皮肤细嫩，腹胀，小指中节短宽，胸骨左缘2肋间～3肋间可闻及明显收缩期杂音。为明确诊断，应首选

A. 颅脑CT
B. 心脏彩超
C. 胸部X线摄片
D. 染色体核型分析
E. 血清T4、TSH测定

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9个月男孩，反复抽搐4次，智力差，表情呆滞。皮肤白嫩，头发黄色，尿有霉臭味。为明确诊断，应选择的检查是

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