假定你是李华，你的留学生朋友Jack来信说他最近经常感冒，请你用英文写一封信，建议他养成良好的生活习惯，经常锻炼，增强体质。内容包括：
1.表示安慰；
2.提出建议；
3.表达祝愿。
注意：1.词数80左右；
2.可以适当增加细节，以使行文连贯。
Dear Jack，
___________________
                                                                                                                                       Yours truly，
                                                                                                                                          Li Hua

【考点】提纲作文．

【答案】Dear Jack，
Hearing that you often suffer from colds，I'm writing to offer some advice on how to improve your physical condition.
First of all，you should pay attention to the weather forecast and put on more clothes when necessary.Besides，a balanced diet and enough sleep can help you keep fit.More importantly，you had better take exercise regularly to build up your body.In addition，it is also beneficial to open the window every day to let the fresh air in.Last but not least，do wear masks in public places to reduce the risk of being infected with viruses.
I sincerely hope that the suggestions mentioned above will be of great help to you.
                                                                                                                                            Yours truly，
                                                                                                                                             Li Hua