Kev sib cais vaj tse tseem yog kev npau suav ntawm ntau tus neeg. Raws li txoj cai, thawj tus kheej lub tsev rau ib tsev neeg hluas nrog ib tug me nyuam yog ib chav tsev me me. Muaj koj tus kheej cov meters hauv tsev txaus siab thiab txhawb nqa. Tab sis nrog rau kev xyiv fab, cov lus nug tshwm sim, yuav ua li cas kom haum txhua tus neeg hauv tsev neeg hauv thaj chaw me me kom yooj yim thiab yooj yim?