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高中英语 Unit 3《Looking good,feeling good》welcome to the unit文字素材14 牛津译林版必修1.doc

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HealthyEatingItiswidelyrecognizedthatahealthybalanceddietisessentialforpreventingdiseaseandillnessmanagingyourweightlivinglongerandkeepingthingssuchashairskinandnailsingoodcondition.Firstandforemosteatinghealthilydoesnotmeanthatyourdietshouldconsistofnothingbutsaladsandsteamedvegetables?althoughbothcanbeextremelyenjoyable!Abalanceddietisonemadeupofabitofeverythinginthecorrectproportions.Thisensuresyourbodygetsenoughofwhatitneedsandisinnowaydeficient.Infactrecommendationsondietarenowlaidoutnotjusttopreventdeficiencybuttoactivelypromoteoptimalhealth!Nutritionalrequirementsvarydependingonaperson'sagesexandoverallleveloffitnessandwiththisinmindtheDepartmentOfHealthhavesetguidelinesaccordingly.MostofusrecognizethetermRDA(recommendeddailyallowance).ThesehavebeenrevisedandarenowsetasDRV's(dietaryreferencevalues)thataretailoredtocertainpopulationgroups.Howeverbetweentheagesof19and50yourrequirementsdonotvaryagreatdeal.Fortheaverageadultitisrecommendedthataroundhalfofourenergyshouldbeprovidedbycarbohydrates35%fromfatsand15%fromprotein.Formostputtingthisintopracticewillmeanmakingsurethatyoueatavarietyofdifferentfoodswithemphasisonfoodsrichinstarch&fiberandsmallerproportionsoffats&sugars.Alsoactivelytryingtoeatmorefruit&vegetablesisalwaysagoodideaastheycontainmanyofthewiderangeofvitaminsandmineralsthebodyneeds.Itisimportanttorememberthatallfoodscanbeincludednothingisforbiddenaslongasitiseatenintherightproportions!