Dear Jane:
I heard from you last week and i'm worried abou your health when it said that you always feel unfit and ask me how to deal with this serious problem.
Here I have some tips for you.firstly,you should go on a healthy diet which makes you stronger and stronger.Secondly,building up your construction is also quite necessary.The last but not the least is that make sure about your sleep time and don't stay up late .
I hold my point that if you do these things you 'll be better immediately!
Best wishes
yours sincerely LIHUA