假定你是李華，你對本班50個學生進行了健康問題的問卷調査。請給你的班主任兼英語老師Jack寫一封電子郵件，告知調査的結果和自己的建議。內容主要包括：

1.依據(jù)表格內容，綜述學生當前存在的健康問題；

2.就中學生如何保持身心健康提出自己的建議。

注意：1.詞數(shù)100左右；

2.可適當增加細節(jié)，以使行文連貫。

Nearly 3,500 years ago,people chewed on leaves or drank a kind of tea made from leaves_______a special chemical to reduce body pains and fever.

Fleming immediately realized that the mould might have an________in treating illnesses caused by bacteria.

Not only has aspirin proved________for reducing fever and helping stop pain,but there are also other things that aspirin can help with.

Some people claim that surfing the Internet is a waste of time.They make the________that children spend too much time chatting and playing games instead of focusing on their school work.

Subject directories are built by humans.Someone has________pages and links and selected all those that are in the directory.

Young people from________backgrounds and different countries can form friendships that will last their entire lives.

Some people have used acupuncture to treat smokers,alcoholics and people who________drugs.

When people need information,from the news and weather forecasts to travel packages and academic research,the Internet is now the first source they________.

This study shows that people who spend too much time on the Internet tend to________from the people and the world round them.