Almost everybody wanted to keep young for ever.What can we do?Let me give you some advice on them .A human body is like the machine.Everybodyonly has onemachine,so never make your machine overuse.People often say,"a person worrying too much getsoldeasy."so don't worry too much.You should realize the fact which being young is a state of mind.Always think you are young;never say you are older.A person is no never too old to learn.Always set goals.Always get something done yourself.And only such away will you feel you are young.