5個月的嬰兒被診斷為呆小症(cretinism)，其最有可能的原因是下列何者？(1)尿素合成代謝障礙(urea cycle disorder)(2)高苯丙胺酸血症(hyperphenylalaninemia)(3)甲狀腺素缺乏(thyroxine deficiency)(4)高膽紅素血症(hyperbilirubinemia)
(A)(1)
(B)(2)
(C)(3)
(D)(4)

一針見血的解答在此~5個月的嬰兒被診斷為...