阅读理解。

Thereisalotofmisunderstandingaboutstudying.Moststudentshavenotbeentaughttheprinciples

behindreallyeffectiveworking.Imagineagraphshowingtheamountapersonlearnsagainstthenumber

ofhoursheworksinaday.Ifhedoesn'tdoanyworkhelearnsnothing(point0).Ifhedoesanhour's

workhelearnsacertainamount(point1).Ifhedoestwohours'workhelearnsabouttwiceasmuch

(point2).Ifhedoesmoreworkhe'lllearnstillmore(point3).Howeverifhetriestodotwenty-three

andahalfhours'workinadayhewillbesotiredthathe'llhardlyrememberanything:whathelearns

willbeverylittle(point4).Ifhedidlessworkhe'dlearnmore(point5).

Nowwhatevertheexactshapeofthegraph'scurve(曲线)madebyjoiningthesepointsitmust

haveahighpoint.Point"X"istheverymaximumanyonecanlearnintheday.Andthisrepresentsthe

optimumthebestamountofworktodo.Itisthebestpossiblecompromisebetweenadequatetime

atthebooksandfatigue(劳累).Fatigueisanabsolutelyrealthing;onecan'tescapeitorignoreit.If

youtrytoignoreitandpressyourselftoworkpasttheoptimum(最适度)youwillonlygetonthis

downwardslopeandachievelessthanthebest-andthenbecomeverytiredandloseyourpowerof

concentration.

Theskillinbeingastudentconsistsofgettingone'sdailystudyasneartheoptimumpointas

possible.Icannottellyouwhattheoptimumis.Itdifferswiththetypeofworkitdiffersfromperson

topersonandeveninthesamepersonitvariesfromweektoweek.Youmusttrytofindyourown.

Everydayyoustudybearthisprincipleoftheoptimuminmind.Whenyoufeelyourselfgettingfatigued

ifyoufindyourselfreadingthesameparagraphoverandoveragainandnottakingitinthat'sapretty

goodsignyou'vereachedyourhighestpointforthedayandshouldstop.Mostordinarystudentsfind

theiroptimumatfivehoursaday.Yoursmaybealittlemoreoralittleless-butifyougetinfivehours'

goodworkadayyouwillbedoingwell.

Nowwhatareyoudoingwithyourselfwhenyouaren'tworking?Beforeexaminationssomestudents

don