Tsheb tu sab hauv tus neeg saib xyuas chav kawm, rau sab hauv cov khoom, feem ntau yuav tsum tsis muaj dej khov los yog muaj tshuaj tua kab mob, yuav tsis muaj cov tshuaj tsw qab thiab cov pa uas ua rau muaj kev phom sij. Tom qab siv yuav tsum yog lub sijhawm nyob ib puag ncig tsis siv neeg ua kom tsis muaj teebmeem, kev nyab xeeb thiab kev tiv thaiv ib puag ncig, tsis tuaj yeem tsim kev puas tsuaj rau tib neeg lub cev.
Nws yuav tsum raug sau tseg tias thaum xaiv lub tsheb tu sab hauv tus neeg saib xyuas, peb yuav tsum them sai sai tias ntau cov khoom ntxuav rau cov khoom siv yas thiab cov ntu roj hmab yuav corrode cov ntaub ntaub thiab iav, yog li peb tuaj yeem xaiv cov khoom ntxuav txawv rau ntau qhov chaw ntawm lub tsheb thiaj li kom tsis raug mob lub tsheb thiab tu kom huv.