专题限时集训(三十)概要写作(Ⅱ)A(2020·浙江绍兴诊断性考试)阅读下面短文，根据其内容写一篇60词左右的内容概要。Ifyou'reworriedthattoomuch“screentime”couldbadlyinfluenceyourchild'sintelligence，newresearchsuggestsyoumightberight.Byanalyzingthedatagatheredfromover4，500U．S.kidsagedbetween8and11in2016and2017，JeremyWalsh，apostdoctoralfellowwiththeCHEOResearchInstituteinOttawa，foundthattoomuch“screentime”couldharmyourchild'sintelligence.Kidswiththesharpestintellectspentlessthantwohoursadayontheircellphones,tabletsandcomputerscoupledwith9to11hoursofsleepandatleastanhourofphysicalactivity.Toomuchscreentimecouldaffectkids'abilitytofocus，especiallyiftheyareswitchingbetweenappsonadeviceorbetweendifferentscreensatthesametime，Walshsuggested.“Oneleadingtheoryisthatmuchtimeonscreensisspentusingmultipleappsordevicesatonce，”hesaid.“Thiscaninterferewithachild'sabilitytofocusonandkeepinterestedinatask.Itcandamagethebuildingblocksforgoodcognition(认知)．”“Sleepisimportantforbraindevelopment，sincethat'swhenthebrainreorganizesitselfandgrows，”Walshadded.Besides，exercisehasbeenshowntoincreasebloodflowtothebrainandoxygenationofbraintissues,andincreasetheconnectivityofnetworksinthebrain.Toomuchscreentimecouldleadtoa“cascade”effect(级联效应)wherekidsdon'tgetenoughsleepandthenarelessactiveduringtheday.“Youcanseehowthiswouldhaveanimpactonbrainhealth，”Walshsaid.Whatshouldparentsdo？Walshadvisedthemtosetfirmrulesabouttheuseofscreensincludinghowlongchildrenareusingthescreens，thekindsofappstheyareusingandhowmanyscreenstheyareusingatonce.Concernedparentsalsoshouldpreviewgamesorappsbeforelettingtheirchildplay，seekoutmoreinteractive(交互的)optionsthatengagethechild'smind，useparentalcontrolstoblockorfilterthecontentandlimitthescreentime.____________________________________________________________________________________________________________________________________________________________________________________________________________________________【参考范文】Newresearchhasfoundthatexcessive“screentime”maynegativelyaffectchildren'sintelligence.(要点1)Itpreventschildrenfromfocusingandstayinginterested，thusrestrictingtheircognitivedevelopment.(要点2)Also，itresultsininadequatesleepandlackofphysicalactivity，whichcandoharmtothebrainhealth.(要点3)Accordingly，parentsareadvisedtoestablishstrictregulationsconcerningtheuseofscreens，monitorthecontentandlimitthescreentime.(要点4)B阅读下面短文，根据其内容写一篇60词左右的内容概要。Speedisveryimportantinavalanche(雪崩)rescues.Therewillbenarrowchancestoescapeifaskierisburiedfor30minutesormore.Nowthat30minutescanmeanthedifferencebetweenlifeanddeathforaskierlostonasnowymountain，mostpeoplewoulddependonlifesavingdogs.Nobleworksasarescueteammemberinavacationland，California.Hetellsus，“Dogsrunfastestwhenanaccidenthappens.”HispartnerWylee，alifesavingdog，cansearchanaccidentscenethesizeofafootballfield.Itonlyneeds5to10minutes.However，5rescueteammembershavetospendacoupleofhoursinthesamearea.Apartfromitsexcellentspeed，NoblechoosesWyleeashispartnerpartlybecauseitweighsonlyabouthalfwhatotherkindsofdogsweigh.Rescueteammembershavetocarrytheirdogstosearchsitesinadditiontocarrying60poundbackpackswithfood，waterandotherequipment.Thedogsneedtheliftsothatdon'tgettiredbeforetheystartworking.Therearen'tadequatedataonhowoftendogstakepartinavalanchesearchesorhowoftentheyareabletohelplocalpeopleindanger.Butthedogsdon'tsavethatmanypeople.That'sbecausetherearen'tthatmanytosave.Aquarterofpeopleindangerdiefromseriousinjuriesbeforethesnowstopsmoving.Ofthoseburiedwhoweren'tkilledbyinjuries，halfdiewithin20minutes.Ifthereisachanceofrescue，though，thedogsalsocutsearchtimefortheremains.EricaMueller，afamousdirector，wantedtoseehowthelifesavingdogsworked，soshevolunteeredtospendpartofanhourinaroomysnowcavewaitingtobefound.Shewasarmedwitharadioandwaswearingseverallayerstostaywarm.AfterbeingrescuedbyWylee，shesaid，“Ican'ttalklikeasurvivor，butitwasdefinitelyacoolwaytoseehowwelltrainedthosedogsare.”____________________________________________________________________________________________________________________________________________________________________________________________________________________________【参考范文】Lifesavingdogsareofvitalimportanceandhelpinavalancherescuesduetotheirexcellentspeed.(要点1)Inaddition，anotheradvantageoflifesavingdogsistheirlightweight.(要点2)Nonetheless，thenumberofpeoplerescuedwasnotlargeowingtoseriousinjuriesandlimitedtime.(要点3)However，throughanexperiment，afamousdirectorEricaMueller，spokehighlyofthelifesavingdogsinavalancherescues.(要点4)
