HowtoKeepYourHealth一些内容参考了：

　　DoeswhatIdoreallyaffectmyhealth?

　　Verymuchso.Allofthemajorcausesofdeath--cancer,heartdisease,stroke,lungdiseaseandinjury--canbepreventedbythingsyoudo.

　　Don'tsmokeorusetobacco.

　　Usingtobaccoisoneofthemostdangerousthingsyoucando.Oneoutofevery6deathsintheUnitedStatescanbeblamedonsmoking.Morepreventableillnessesarecausedbytobaccothanbyanythingelse.

　　Exercisecanhelppreventheartdisease,highbloodpressure,diabetes,osteoporosis,depressionand,possibly,coloncancer,strokeandbackinjury.You'llalsofeelbetterandkeepyourweightundercontrolifyouexerciseregularly.Trytoexercisefor30to60minutes,4to6timesaweek,butanyamountisbetterthannone.