Cov tsheb thauj khoom siv kho dua tshiab suav nrog kev hloov ntawm cov li qub, thiab cov tshuab hluav taws xob, sib txuas, cov hlua khi, siv nyiaj txiag, lub log tsheb.
Yog tias txoj saw hlau yog lub sijhawm, nws yog ib qho tsim nyog los hloov cov khoom siv kho kom zoo nkauj, thiab lwm yam ntxiv, nws kuj yuav tsum tau hloov kho cov khoom sab nraud kev ua tau zoo ntawm lub cav.