anything和something的區別是什么意思

　　例句：

　　Can you smell something burning?

　　你有沒有聞到什么東西燒焦了？

　　Would you like something to eat?

　　你想吃點什么嗎？

　　Do you have anything to declare?

　　你有什么要申報的嗎？

　　They'll eat almost anything.

　　他們幾乎什么都吃。

　　I overreact to anything sad.

　　我對任何悲傷的事情都反應過激。