Kev tiv thaiv kev nyab xeeb ntawm iav fiber xov

1. Tom qab kev sib tsoo ntawm lub qhov muag, thov yaug dej kom ntau thiab nrhiav kev pab kho mob.

2. Hnav cov khaub ncaws tiv thaiv uas tsim nyog.

3. Tsis txhob nqus cov hmoov av.

4. Zam tsis txhob kov cov tawv nqaij thiab qhov muag.