没有什么特殊的，就是一个长不大的小孩，一个正常8-9岁儿童有什么危险，唐氏就有什么危险。

来源: 于 2017-02-17 14:37:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

https://en.wikipedia.org/wiki/Down_syndrome

The average IQ of a young adult with Down syndrome is 50, equivalent to the mental ability of an 8- or 9-year-old child, but this can vary widely.[3]