Cov twj tua hluav taws thiab cov chav tua hluav taws yog qhov tseem ceeb kev ntsuas kev nyab xeeb hauv kev tsim kho, kev lag luam, thiab lwm thaj teb.
1. Kev tsim kho: Cov twj hluav taws tau siv dav hauv kev ua haujlwm, feem ntau los tiv thaiv kev nyab xeeb ntawm cov tsev thiab cov neeg hauv lawv. Hauv nroog loj li cov tsev kho mob, cov tsev kawm ntawv, siab} hot }els, thiab hluav taws xob loj, thiab hluav taws kub cov yeeb nkab tes hauj lwm kom ntseeg tau tias muaj dej tua hluav taws txaus.
2. Muaj: Hauv kev tsim khoom lag luam, xws li kev tsim khoom lag luam, thiab kev tiv thaiv roj teeb, thiab kev tiv thaiv hluav taws xob tsim nyog tsim kom muaj kev nyab xeeb ib puag ncig thiab tiv thaiv kev nyab xeeb ntawm cov neeg ua haujlwm.
3. Tsheb thauj mus los: Hauv kev thauj mus los tsev zoo li subways, cov chaw nres tsheb ciav hlau, uas nquag siv nyob rau hauv cov neeg muaj lub luag haujlwm tseem ceeb hauv kev tswj hwm cov kev tiv thaiv hluav taws xob hauv kev tswj hwm hluav taws kub.
