(单选题)3: 患儿,男性,3岁,生后半年发现智能发育落后,反复惊厥,且尿有鼠尿臭味,体检:目光呆滞,毛发棕黄,心肺正常,四肢肌张力高,膝腱反射亢进,尿三氯化铁试验阳性,该患儿可能诊断为
A: 苯丙酮尿症
B: 半乳糖血下
C: 高精氨酸血症
D: 组氨酸血症
E: 肝糖原累积症
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