患儿,男,2岁,因智能发育后就诊。既往曾有3次无热惊厥。查体:皮肤干燥伴湿疹,毛发色浅,肌张力稍高,膝腱反射亢进。首选的辅助检查是
A 染色体核型分析 B
尿三氯化铁 C
Guthrie细菌生长抑素试验 D
鸟蝶呤分析 E
T<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12862671_0.gif">、T<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12862671_0_1.gif">、TSH测定