文献简介1.RecentlyinvestigatorshaveexaminedtheeffectsofXonY.2.Inthepasttwodecadesanumberofresearchershavesoughttodetermine......3.Previousstudieshavereported......4.AconsiderableamountofliteraturehasbeenpublishedonX.Thesestudies......5.Smith(:)showshow,inthepast,researchintoXwasmainlyconcernedwith.......6.SurveyssuchasthatconductedbySmith()showedthat......7.ThefirstseriousdiscussionsandanalysesofXemergedduringtheswith......8.Recentevidencesuggeststhat.......9.Severalattempshavebeenmadeto......10.Anumberofresearchershavereported......11.XswerereportedinthefirstmodelsofY(e.g.,Smith,;Smith,Patel,).12.WhatweknowaboutXislargelybaseduponempiricalstudiesthatinvestigatehow......StudiesofXshowtheimportanceof.....强调研究领域存在的问题1.However,theserapidchangesarehavingaseriouseffect......2.However,amajorproblemwiththiskindofapplicationis......3.LackofXhasexistedasahealthproblemformanyyears.Despiteitssafetyandefficacy,Xsuffersfromseveralmajordrawbacks:4.However,researchhasconsistentlyshownthatfirstyearstudentshavenotattainedanadequateunderstandingof......5.ThereisincreasingconcernthatsomeXsarebeingdisadvantaged......6.Despiteitslongclinicalsuccess,Xhasanumberofproblemsinuse.7.Questionshavebeenraisedaboutthesafetyofprolongeduseof......强调研究领域存在的争议1.Todatetherehasbeenlittleagreementonwhat......2.Morerecently,literaturehasemergedthatofferscontradictoryfindingsabout.....3.Oneobserverhasalreadydrawnattentiontotheparadoxin......4.InmanyXsadebateistakingplacebetweenYsandZsconcerning......5.ThecontroversyaboutscientificevidenceforXhasragedunabatedforoveracentury.6.Debatecontinuesaboutthebeststrategiesforthemanagementof......7.Thisconcepthasrecentlybeenchallengedby.......studiesdemonstrating.......强调研究领域的知识差距1.Sofar,however,therehasbeenlittlediscussionabout......2.LittleisknownaboutXanditisnotclearwhatfactors.......3.However,fartoolittleattentionhasbeenpaidto......4.Inaddition,noresearchhasbeenfoundthatsurveyed.......5.Sofarthismethodhasonlybeenappliedto......6.Thisindicatesaneedtounderstandthevariousperceptionsofpovertythatexistamong......7.However,theevidenceforthisrelationshipisinconclusive......8.WhatisnotyetclearistheimpactofXon......9.TheneurobiologicalbasisofthisXispoorlyunderstood.10.However,muchuncertaintystillexistsabouttherelationbetween......11.Untilrecently,therehasbeennoreliableevidencethat......12.However,therehavebeennocontrolledstudieswhich