A Kate is reading something about how to keep healthy on the Internet. ◆ Good sleep is important for your health. You need about seven hours ’ sleep a night. Don ’ t eat or read in bed. Go to bed and get up at the same time every day. For more information, please visit www. sleeping. com. ◆ How often do you exercise? If you want to keep healthy, try to exercise for 30 minutes a day, three or four times a week. For more information, please call Health Line at 180-2000. ◆ Studies show that the cold or flu virus( 病毒) can live on our hands for long. So you should wash your hands often with soap. For more ways to prevent( 预防) the cold or flu, please call Health Line at 180-1313. ◆ Brush your teeth twice a day and see a dentist at least once a year. The examination is not only for the health of your teeth, but for the whole body. Please visit www. mydr. com for more information.