Cov ntsiab lus tsim kho: Kev hloov pauv ntawm cov kab muaj dej, kab nthuav dav, roj ultra thiab cov khoom tiv thaiv huab cua thiab cov khoom tiv thaiv ib puag ncig; Kev kho cov dej kho mob.
Cov txheej txheem tseem ceeb: dej tshuaj tsuag (ncig ua si (sib ncig ua kom nqus dej kom nqus) nce mus rau cov qauv paug.
Yav dhau los:Tub ceev xwm pib