Cov ntawv sau npliag thiab cov khoom sib txuam ntawm cov xim ntawm cov xaum xim / xaum yog qhov tseem ceeb hauv kev kos duab txhua hnub thiab sau ntawv. Cov yeeb yaj kiab no tsuas yog siv nyob rau hauv cov xaum kob, xaum thiab lwm thaj teb, tsom mus rau kev hloov pauv xim, thiab txhim kho kev npliag ntawv.