It’acontroversialtopicsincecomputergameismoreandmorepopularinourdailylife.Somepeoplethinkthatcomputergameisanewwayofentertainmentforrelaxing.Somecg(shortforcomptergames)canprovidesomebackgroundknowledgeforpeoplewhoplaythem.Cgcankillleisuretime.Intheirsparetime,theycanmakefriendsduringplayingcomputergamesonline,meanwhile,somecanstimulateteamworkspirit.SomecgarehelpfultoimprovetheirIQandconcentratetheirattentiontosolveproblem.Buteverycoinhastwosides.Thoughplayingcghavesomanyadvantages.Istillthinkthedisadvantagesmakemorenegativeeffectonpeoplewhoareindulgedinit,especiallyadolescent.Reasonsareasfollowed:First,cgtakeuptheirstudytime.Asweknow,adolescenthavelowself-controlabilitiesonthemselves.Theyshouldspendmoretimeontheirstudy.However,oncetheyareattractedbycg,theycan’tconcentratetheirattentiononstudy.Second,cgdoharmtotheirhealth,especiallytheireyes.Cgmakethemsitthereandstareatcomputerforalongtimewithoutanyopeningexercise,whichareverybadtotheirbody.Third,somecgarefullofnastyandviolentcontentandpictures,whichmisleadstheirvalueandleadtothemcommitcrimes.Insummery,weshouldtakemeasurestocontroltheirindulgencetowardcg.Parentsshouldsupervisetheirchildren,schoolshouldmakegoodguidanceonstudents,andtheadolescentthemselfshoulddistinguishwhatismoreimportantandimprovetheirself-controlabilities.