Raws li cov khoom lag luam ntawm ppr tube tau lees paub thiab txhawj xeeb los ntawm cov neeg siv ntau hauv niaj hnub no' s lub raj muag khoom ua lag luam, muaj ntau thiab ntau hom rau hom khoom no hauv khw. Coob tus neeg ua yeeb nkab tau pib tsim cov hom yeeb nkab no, yog li raws li tus neeg siv khoom lag luam, muaj ntau hom khoom lag luam los xaiv. Txawm li cas los xij, nyob rau hauv lub ntsej muag ntawm ntau txoj kev xaiv, yog tias koj xav xaiv cov yeeb nkab khoom haum rau koj qhov kev siv, muaj ntau yam hauv kev saib xyuas. Cov ntsiab lus hauv qab no luv luv piav qhia txog dab tsi cov neeg siv yuav tsum them sai sai rau thaum mus yuav cov ppr leeg.
Cov neeg siv yuav tsum tau them sai sai rau cov tsos ntawm cov raj thaum lub sijhawm yuav khoom ntawm ppr tubes. Txhawm rau yuav cov khoom lag luam zoo, cov neeg siv yuav tsum tau soj ntsuam cov tsos ntawm cov khoom thaum lub sijhawm yuav khoom los saib seb qhov khoom zoo puas tsim nyog. Tshwj xeeb rau qee qhov kev lag luam yeeb nkab uas txawv teb, cov keeb kwm thiab daim ntawv lo cuav ntawm cov yeeb nkab khoom lag luam yuav tsum tau pom tseeb.
Nyob rau hauv tus txheej txheem ntawm kev yuav lub ppr leeg, ntxiv rau qhov yuav tsum tau ua txoj haujlwm zoo ntawm kev soj ntsuam cov tsos ntawm cov khoom, nws kuj tseem xav ua txoj haujlwm zoo hauv kev xaiv hom duab ntawm cov khoom lag luam. Feem ntau hais lus, cov khoom lag luam muaj npe nrog cov neeg siab dua yuav ua tau zoo dua ntawm txhua txoj hauv kev, kom cov khoom siv yeeb nkab zoo li no yuav nrov dua.
Qhov saum toj no yog qee qhov tseem ceeb tshaj uas cov neeg siv yuav tsum them nyiaj rau thaum mus yuav cov hlab ppr.
