Cov hluav taws kub hnyiab yuav tsum tau tiv thaiv hauv lub neej niaj hnub, thiab qhov rooj hluav taws kuj tau dhau los ua kev xaiv ntawm ntau tus neeg. Lub qhov rooj hluav taws kub ua los ntawm kev sib xyaw ntawm cov hlau zoo thiab cov khoom siv refractory tuaj yeem tsis tsuas yog ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb, tab sis kuj xyuas kom tus neeg siv tuaj yeem siv nws ruaj khov rau lub sijhawm ntev yam tsis muaj kev puas tsuaj.

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