Today'steenagersatleastintheeyesoftheoldergenerationhavenoreasontobeunhappy.Howeverarecentsurvey（调查）aimingatteenagersin22provincesshowsthat12.97percentofthepeoplequestionedhavesomesortofmentalproblems.Thisoriginatesfromquarrellingwithpeopleorfrompressurewithstudiescausingdepressionconstantworryandfearthesurveysays.

Expertswarnthatmentalproblemsarebecominganincreasinglybiggerthreattoteenagersandhaveresultedinhigherratesofsmokingdrugtakingandover-drinkingamongyouth.

Today'steenagersarefacedwithtougherchallengesinstudyandemployment.Asanonlychildinafamilyyoungpeoplebearhigherexpectationsfromtheirparents.

Livingundersuchgreatpressuremakesteenagerssusceptibletomentalproblems.Ontheotherhandteachersandparentstendtofocustheirattentionsonacademicperformancesbuttakenonoticeoftheirfeelings.

Mentalproblemsifnotaddressedproperlywillgreatlyinfluencethequalityofthecountry'stalent（人才）.Itisestimated（估计）thatbytheyear2020mentalillnesswillincreasetoonefourthofthetotalcasesofillnessfromthepresentonefifth.

Thesurveyshouldringalarmbellstoschoolsandparentsandefficientmeasuresmustbetakentoensurethehealthofourteenagers-bothphysicallyandmentally.

Schoolshouldbuildupacontingent（可能的事件）ofprofessionalpersonneltogivestudentsregularcheckupsandconsultations（咨询）ontheirmentalhealth.

Parentsareencouragedtomakefriendswiththeirchildrensothattheyarewillingtoanddaretosharetheirproblemswithparents.

(1)Theauthor'spurposeinwritingthetextis________.

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A．tosettletheteenagers'mentalproblems

B．toblametheteachersandparentsfortheteenagers'mentalproblem

C．totellusthereasonsfortheproblem

D．toanalyze（分析）theproblemwhichisimportanttoteenagers

(2)Thesurveysaystheteenagershavementalproblemsbecause________.

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A．theirquarrelswithothersorpressurewithstudiescausedepressionconstantworryandfear

B．theirparentsgivetoohighexpectationstothem

C．theirteachersand