Bloodsuckingbedbugs （臭虫） havemadeacomebackinrecentyears．Butasvictimsofaffectionhavebecomeincreasinglydesperatetoridtheirhomesofthedisturbingpests，manyhaveonlydonethemselvesmoreharm．

Bedbugsdonottransmitdiseaseorcauseillness-buttheinsecticidesusedtomakethemdo．Atotalof111illnessesassociatedwithbedbug-relatedinsecticideswerereportedinsevenstatesbetween2003and2011，theCentersforDiseaseControlandPrevention （CDC） saidonThursday．Mostcasesofpoisoningwerenotsevere，butthedataincludedonedeath．

Thatcaseinvolveda65-year-oldwomaninNorthCarolinawhodiedin2011．Aftershecomplainedtoherhusbandaboutbedbugs，theCDCreportsaid，hesprayedtheinsideoftheirhome，includingthebaseboard，walls，andtheareaaroundthebed，withthe insecticide OrthoHomeDefenseMax．Hethenappliedadifferentproduct，OrthoLawnandGardenInsectKiller，totheirbedding．Neitherinsecticideisregisteredforuseagainstbedbugs，theCDCsaid．Thatday，thecouplealsoemptiedninecansofHotShotFoggerintheirhome．Twodayslater，theyreappliedtheinsecticidesandreleasedninemorecansofHotShotBedbugandInsectKiller．ThewomanthenappliedtheinsecticideHotShotBedbugandInsectKillerdirectlytoherarmsandchest，andwetherhairwithitbeforecoveringherheadwithaplasticcap．

Twodayslater，herhusbandfoundher．Shewastakentothehospitalwheresheremainedonaventilator （呼吸器） forninedaysuntilshedied．Thewomanhadhadahistoryofhealthproblems，includingkidney （肾） failure，heartdisease，highbloodpressureand，anddepression，theCDCreportsaid．Shehadbeentakingatleast10kindsofmedicineatthetimeofherdeath．

Asidefromtheonereporteddeath，mostothercasesofpoisoningweremild．Commonlyreportedsymptomsofexposureincludedheadacheanddizziness，breathingdifficulties．

41．Inparagraphone，"manyhaveonlydonethemselvesmoreharm"，theauthormeansthat___．

A．thebugsthemselvesaremoreharmfultothevictims

B．therearemoreandmorevictimsofbedbugsnowadays

C．moreandmorebedbugshavecomebackrecently

D．whatvictimshavedoneismoreharmfultothemselves

42．Theun