by ZENG Aijing » Tue Oct 22, 2019 7:26 am
Keep a distance of 30cm from the computer.
Use a computer for 30 minutes each time.
Use a computer for 3 days a week.
Can't use the computer for 2 hours before going to bed.
Use a computer for no more than 3 hours a day.
Keep a distance of 30cm from the computer.
Use a computer for 30 minutes each time.
Use a computer for 3 days a week.
Can't use the computer for 2 hours before going to bed.
Use a computer for no more than 3 hours a day.
