假定你是李华，请针对最近你们班许多同学热衷于集邮这一现象给21st century写一封信，并谈谈自己的看法。
内容主要包括：
1.集邮的好处(增长知识、减压、升值）;
2.出现的问题(耗费过多金钱和时间）；
３.你的建议。
注意：
1.词数100左右；
2. 可以适当增加细节，以使行文连贯；
3. 开头已为你写好，不计入总词数。
Dear editor,
At present, more and more students in our class are addicted to collecting stamps in their spare time.
Dear editor，
At present, more and more students in our class are addicted to collecting stamps in their spare time.
It is true that collecting stamps can make our study life more colorful and enjoyable. It can enrich our knowledge as well as make us relax under the great pressure of studies. Besides, as time goes on, some collections will be more valuable, which can bring us a lot of profits. However, some of the students spend too much time and money on it Thus, they fall far behind others in study.
In my opinion, collecting stamps can be fun as a hobby, but we should balance the relationship between study and hobbies. If we are addicted to hobbies, we will spend less time on our study and our precious time will be wasted.
Yours, Li Hua