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（每日一读）高考英语考前突破阅读理解能力文化教育喝咖啡能拯救视力素材.doc

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喝咖啡能拯救视力Adailycupofcoffeecansaveyoureyesight,scientistsclaim.科学家称，每日一杯咖啡可以拯救你的视力。Achemicalfoundinthedrinkpreventsdeterioratingeyesightandpossibleblindnessfromretinaldegenerationduetoglaucoma（青光眼）,ageinganddiabetes.ResearchersatCornellUnivesityinNewYorkwerelookingatcoffee'santioxidanteffectswhentheymadethediscovery.Coffeecontains1percentcaffeinebutbetween7and9percentchlorogenicacid（绿原酸）whichisastrongantioxidant.Thestudy,publishedintheJournalofAgriculturalandFoodChemistry,foundthatinmicethisacidpreventedretinaldegeneration.ChangY.Lee,aprofessoroffoodscienceandthestudy'sseniorauthorsaid:'Theretinaisathintissuelayerontheinside,backwalloftheeyewithmillionsoflight-sensitivecellsandothernervecellsthatreceiveandorganisevisualinformation.'Itisalsooneofthemostmetabolicallyactivetissues,demandinghighlevelsofoxygenandmakingitpronetooxidativestress.'Thelackofoxygenandproductionoffreeradicalsleadstotissuedamageandlossofsight.'Headded:'Thestudyisimportantinunderstandingfunctionalfoods,thatis,naturalfoodsthatprovidebeneficialhealtheffects.'Coffeeisthemostpopulardrinkintheworld,andweareunderstandingwhatbenefitwecangetfromthat.'PreviousstudieshaveshownthatcoffeealsocutstheriskofsuchchronicdiseasesasParkinson's,prostatecancer,diabetes,Alzheimer'sandage-relatedcognitivedeclines.