young近义词？

有adolescent:This course is specially designed for adolescents.

本课程是专门为青少年设计的。

He is an adolescent who is naive and carefree.

他是一个天真无邪 无忧无虑的少年

Most adolescent problems are temporary.

多数青春期的问题都是暂时的。

He was showing off, as is the way with adolescent boys.

他在炫耀，青春期的男孩都是这个样子。

A little adolescent rebellion is commonly believed to be healthy.

少许青春期叛逆被普遍认为是一个健康的现象。