①"junkfood"isakindoffoodwithhighenergycontentandrelativelylackofothernutrients.Inotherwords,theycanonlyprovidetoomuchenergy,andtheword"junk"isusedtoremindpeoplethatthesefoodsarenotgoodforpeopletoeat,sotheyshouldbeeatenaslittleaspossible.Infact,notmuchofthetraditionalChinesedietisreally"junk"food,whileforeignfastfoodfavoredbymanyyoungconsumersnowadaysismostlylinkedto"junkfood".Friedchicken,Frenchfries,chocolateshakes,baconcheeseburgers,etc.,areallhighenergyfoodswithoutexception.
②Theharmof"junkfood"liesin"threehighandthreelow",thatis,highenergy,highfat,highprotein,lowvitamin,lowdietaryfiber,lowmineralelements.Amongthem,"threelow"justmeansthattheyarenotgoodforhealth,"threehigh"actuallycanbringharmtopeople.Inparticular,highfat,whileprovidingdelicioustastetofood,greatlyimprovestheenergydensityoffood.Consumerswillconsumemorecaloriesiftheyeatthesameamountoffood.Ifthedailyintakeofcaloriesaretoohightoburnoff,the
biggestproblemisobesity.MorethanaquarterofAdultsintheUnitedStatesareobese,accordingtoaU.S.survey,andasignificantportionoftheproblemisbelievedtobedueto"junkfood."Takealightmanualworkerforexample,thedailyenergyneedsisabout2100kilocalories,andapieceoffriedchickencanaccountforone-thirdofthecalories.Inaddition,milkshakesandchocolatearenotlowinenergy.Ifyoueatabigburger,ashake,abagofchips,andalargecokeinonemeal,you'reprobablyconsumingmoreenergythanyouneedforthewholeday.Ifthereisnoenoughexercise,toomuchenergyconsumptioncannotbedropped,canonlybetransformedintofatembellishmentatthewaistandhip.
③Infact,westernfastfoodisnota"floodbeast",asmanynutritionexpertssay,thereisnoperfectfood,thereisnogoodfood,thekeyishowtoeat.Thedisadvantageofthiskindoffastfoodisthattheenergycontentisveryhigh,whichisfarbeyondthestandardforordinarypeople,butitisagoodfoodtosupplementenergyforpeoplewhoconsumealotofenergyindailylife.Forexample,Phelps,whopickedeightgoldMEDALSattheBeijingOlympicGames,hashighintensitytrainingandcompetitionevery
day,anditsenergyconsumptionisveryamazing,sohisdietmustbebasedonhighenergydiet.Tohim,thefastfoodisnolonger"junkfood",butatreasure.Ofcourse,theaverageofuswillneverreachPhelps'levelofactivity,andourdailyenergyrequirementsarelimited.Sobeforeyoudiveintoafastfoodrestaurant,thinkaboutwhetheryou'regettingenoughexerciseforyourmeal.However,thereisnoneedtoworrytoomuch.Theharmfuleffectsofjunkfoodcanbegreatlyreducedbyappropriatelyreducingtheintakeofotherfoodsandincreasingtheamountofactivity.Besides,itisalsoveryfreshandinterestingtotryforeignfoodflavor,butdon'teatitoften.
(1)Whatissobadaboutjunkfoodafterreadingthisarticle
(2)thearticleintroducestheexplanationofthejunkfoodideais:(1)__________(2)thedangersofjunkfood(3)___________,thearticleusethemainpropositions,suchas__________thedescriptionmethod.
(3)Analyzetheexpressioneffectofthewords"floodbeast"inparagraph3.
(4)Junkfoodisaffectingourlife.Pleasewriteapropagandamessagetogivepeopleawarmreminder.