1.TheUnitedStatesPostalServicehasasystemtoensureitsemployees'safety.2.OneofficialsaysUSPSisuniqueinthatithasmoredirectreachtocommunitiescomparedwithotherfederalagencies.3.Naturaldisasterscanhavealong-lastingimpactoncommunitylife.4.Maildeliveryserviceisstillresponsibleforthecompletionofalmosthalfofpayments.5.Thesightofamailmanonthestreetisareassuringsignoflifebecomingnormalagain.6.AfterHuricaneKatrinaiteruptedroutinedelivery,temporarymailservicepointsweresetup.7.PostalserviceinsomeregionsintheU.S.wassuspendedduetoextremecoldweather.8.Privatepostalcompaniesalsosupportdisasterreliefefortsbydistributingurgentsupplies.9.AdedicatedUSPSemployeewasonthejobcarryingoutdutiesinspiteofextremeconditions.10.Postalservicesworkhardtoidentifyitemsthatrequireprioritytreatment.注：1-10题对应1-10空，请写所匹配段落的【大写】字母。