以信的形式写一篇英语作文给别人关于怎样保持健康的建议

As we all know, keeping healthy is important for every one of us.
We can’t be offered good jobs in the future if we are not strong enough.
So, how can we keep fit? In my opinion, we should try our best to do
the following:
First, I think you’d better take exercise every day.
It is considered that people who do sports every day have more healthy
hearts than those who don’t. However, it’s best to exercise regularly.
Half an hour a day is enough. Spending too much or too little time on it
is not a good idea.