1 . 请根据上下文内容，将文中划线部分译成汉语或者英语，并将答案转写到答题卡上。

Exercise has a range of health benefits. However, some people believe that     1     if some exercise is good, more is always better, so they tend to exercise for a long time without stopping. For example, some people go jogging for several hours at a time because of the step-counting smartphone apps.     2     还有些人周末连续锻炼数个小时 to make up for their lack of exercise during the weekdays. Habits like these put stress on the body, and if maintained over the long term,     3     they can be a serious health risk.

Generally speaking, aerobic routines that last over 100 minutes have a certain health risk. On the other hand,     4     they should not be shorter than 10 minutes. If you do exercise for only a few minutes, you may not be working out long enough to see any benefits from it. When you exercise, aim for the daily average of 30 to 60 minutes.     5     这将会防止你受伤. Moreover, it will ensure that the exercise you do has a positive effect on your physical health.

2 . 假设你是校体育部部长李华， 你校英国交换生 Ivan 在全市网球比赛中获得了第一名。请你根据以下要点提示，用英语给 Ivan 写一封信，向他表示祝贺。
要点提示：
1. 表明得知 Ivan 获奖的消息；
2. 对 Ivan 的成功进行积极评价；
3. 表达衷心的祝贺。