求英语作文.假如你是李涛,你的笔友Sam来信说,他爷爷的身体很不好.你想向他介绍一位80岁的老爷爷的养生之道.他虽年事已高,但身体很好,精力充沛.于是你去采访了他,并把结果用电子邮件的形式告诉了Sam.

Dear Sam:
Hi,Sam.I'm Li Tao.How are you?
I found a good way to help your grandpapa.I hope it will help him.I visited an old man yesterday,he is about 80 years old.He is advanced in age,but his body is very good,still vigorous.He told me he likes eating red dates.He always early to bed,early to rise.He does the exercise every morning.And he is always keeping a good mood.He said,do these will help to keep his body healthy.
I think it's a good way to keep fit,too.I hope your grandpapa will be health.I look forward to your good news!
Yours,
Li Tao谢谢啦嗯