下列图表反映的是我校2002年与2005年学生健康状况调查的部分数据。请你用英文为某报写一份报告，反映该校三年间学生健康状况的变化情况，分析其原因并提出相应的改进措施(不少于两条)。

　　注意：1.报告必须包括图表中所有内容。

　　2.词数：120左右。第一句已给出(不计入总词数)。

　　A recent survey shows that the health of the students in our school has been going from bad to worse in the past three years . The number of nearsighted students has increased from 78.2% in 2002 to 92.5% in 2005 , and that of overweight , from 36% to 52.4%. Compared to 2002 nearly 10% more students lack sleep because of more homework to do . Besides , over 15% more students has become mentally unhealthy .

　　To improve students’ health , we call for less homework . Only in this way can students get plenty of sleep and meanwhile prevent them from getting nearsighted . Proper diets and exercise should also be paid attention to so that they won’t easily put on weight . With their heavy burdens removed , students can then be mentally healthy.