假定你是李華，你校英文報正在舉辦題為"健康睡眠，高效學習"的征文活動。請你寫一篇短文投稿，內容包括：
1．睡眠的重要性；
2．熬夜的危害；
3．你的建議。
注意：
1．詞數80左右；
2．請按如下格式在答題卡的相應位置作答。
Healthy Sleep，Effective Learning_______

【考點】提綱作文；身心健康．

【答案】Healthy Sleep，Effective LearningRecently，there has been an increasing concern about the phenomenon that high school students are lacking enough sleep.Many of them stay up late for various reasons，ranging from heavy schoolwork to being addicted to digital devices.
The importance of a good sleep can never be emphasized too much.It can help us stay focused in class，and furthermore，serves as a basic foundation for good health.On the contrary，the long-term shortage of sleep not only robs us of energy needed for study in the daytime，but also gives rise to many potential physical and mental diseases.
Therefore，it is suggested that we should work out an efficient plan for our school life，striking a balance between work and study.
Only by keeping a healthy life-style can we have a strong body to deal with future challenges.