单选题：新生儿先天性胸腺缺陷，可导致

题目内容：
新生儿先天性胸腺缺陷，可导致 A．细胞免疫缺陷
B．抗体产生下降
C．细胞免疫缺陷，抗体产生正常
D．细胞免疫缺陷，抗体产生下降
E．细胞免疫正常，抗体产生下降

参考答案：
答案解析：

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