I am writing this letter to call on all the students in our university to do something for Li Ping, one of our schoolmates, who is suffering from the serious disease. 　　As some of you may know, Li Ping is one of the freshmen the English Department. She is longing for the bright future like you and me . Unfortunately, last month, she was struck by Lerkemia. Now she is hospitalized and in a serious condition. What is worse, Li Ping comes from a poor village family and it si impossible for her family to raise such a large sum of money in such pressing time. 　　As you see, now Li Ping is in great nedd of fanancial aid and daily caring. So it is high time for you to extend your helping hands to her. If you would like to provide your love and care to Li Ping, especially in the form of donation, please call at 12345678 or 23456789 at any time. 　　Thank you! 　　Sinerely yours, 　　The Student Union 　　8） 海報結構公式 　　標題：活動主題或直接用poster 　　正文：第一段：概括引出活動，交代活動主辦單位、活動的時間和地點。 　　第二段：闡述活動的主要目的和具體安排。 　　第三段：說明參加活動的條件和方式，交代聯系或咨詢方式，呼吁大家踴躍參與。 　　右下角：落款寫主辦單位名稱。