Hluav taws kub qhov rooj yog qhov zoo nkauj zoo nkauj thiab ruaj khov hauv cov qauv. Hluav taws kub qhov rooj, raws li lub qhov rooj khiav tawm thaum muaj xwm ceev, tsis tas yuav tsum kaw lossis qhib, uas tuaj yeem tiv thaiv tub sab nyiag thiab tuaj yeem nkag mus thiab tawm tau dawb. Nws muab kev tiv thaiv kev ruaj ntseg 24-teev txhua hnub.

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