girl是可数名词还是不可数名词?

　　例句：

　　Don was deep in conversation with the girl on his right.

　　唐与他右边的女孩在专心交谈。

　　Get dressed now, there's a good girl.

　　现在把衣服穿好，乖孩子。

　　He introduced me to a Greek girl at the party.

　　他在聚会上介绍我认识了一位希腊姑娘。

　　You wouldn't know what it means ─ it's a girl thing.

　　你不会知道那是什么意思，那是女孩子家的事。