患儿男，5岁，智力低下,头发稀疏发黄，皮 肤白嫩，四肢肌张力强，巴氏征（ + )，三氯 化铁试验（+ )。为明确诊断，最应进行的 检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28728' and id < 2343406 and id<>'2343406' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28728' and id > 2343406 and id<>'2343406' order by id asc limit 5