给你提供一封慰问信，你可以根据这封信来套用词汇和句子。
Dear**，
    Since I heard that you were sick and in hospital, I have been very worried。 How are you feeling now? Are you doing any better? I hope I can visit you soon。
   The weather has been changing a lot lately, which often causes illness, and you must also be suffering from school-related stress。
   It's easy to get sick under these conditions。 Once you are well, please take care not to get ill again。 Since you are now in hospital you should completely relax and not worry about your school work。
   As soon as you're out of the hospital I will try my best to help you with your studies。 Get well sonn!   
                      
                                         Yours sincerely,
                                            **
这篇慰问信有点长，主要是为了能给你提供较多的句子，好供你选择，你可以把根据你所需要的情景把里面词改动一下。
  希望能给你提供帮助。