I think we should help each other.

Firstly,everyone lives in the society and everyone is a member of it.If we help each other,then we will live a happier life.Helping each other can raise the standard of living（提高生活水平).

Secondly,helping each other is also good for ourselves.There's a famous saying,rose to lover,smell in hands(赠人玫瑰手留余香）,which shows the good of helping others.Usually,we will get some reward after we help others.And we'll feel happy,too.

It's quite necessary.for us to help each other.