女孩,2岁生长发育迟缓及智力发育落后,查体:眼裂小、眼外毗上斜、眼距宽、外耳小、鼻粱低平,皮肤细腻。为明确诊断首选的检查是
A 尿三氯化铁试验 B
尿蝶呤分析 C
血T<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12863158_0.gif">、T<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12863158_0_1.gif">、TSH D
骨龄测定 E
染色体核型分析