
Nrog rau kev tiv thaiv ib puag ncig thiab kev muaj tswv yim, peb cov ntawv siv rov qab los ua kev ua noj thiab ci. Cov khoom yog ua los ntawm cov ntaub ntawv tshwj xeeb, uas tuaj yeem rov siv dua tshiab thiab rov qab txo cov ntawv pov tseg rau ib puag ncig thiab pab cov kev tiv thaiv ib puag ncig.
Daim ntawv qhia txog cov khoom noj glasin muaj kev nyab xeeb thiab ntseeg tau rau kev sib chwv nrog zaub mov. Nws muaj cov dej noo zoo heev thiab cov roj kuj, kom cov khoom noj uas muaj zog nyob hauv qhov zoo thaum lub sijhawm cia thiab tsheb thauj mus los. Daim ntawv du thiab nkig, ua haujlwm zoo, haum rau txhua hom khoom noj ntim khoom, seb nws cov khoom noj khoom haus, lossis cov khoom tshiab, tuaj yeem muab cov khoom siv ntim cov khoom siv zoo.