問題1：美國研究生留學申請信的最佳字數是多少?好像說是300-400，但怎么好多人寫的篇幅跟PS似的`，何況我的三個推薦人，除一個比較熟悉我可以寫出detail之外，另兩位僅僅是教過我課而已，這樣要怎么寫內容，字數多少合適呢?
回答：一般來說，美國研究生申請信字數a4紙用5號字寫占3/4張紙即可，沒有具體要求。
問題2：因為我沒有網申過，所以不大明白。推薦信有一定格式嗎，比如稱呼，落款，日期什么的。
回答：美國研究生留學申請信的格式有些模式可循，以下將針對各段提供模式作參考：
(一)抬頭可用的格式有：
Dear Sir/Madam;
To Whom It May Concern:
(二)第一段：引文句子可以引用如：
“It is a pleasure to recommend to you (name), a former student of mine at (name of university).”
“I an very happy to have this opportunity to recommend (name), who is presently applying for admission to your graduate (or undergraduate) program in (name of program).”
“I understand that (name) is applying for admissions to your graduate (undergraduate) school, and has requested that I write this letter of recommendation for her/him.”
“In my capacity as professor at xxxx University, I have known xxx for three years, as both his/her advisor and professor.”
(三)第二段：這段可以提供最實質的內容。譬如,如果推薦者是教授, 解釋學生在他門下所修的課程。
“(name) took two of my courses during the 1984-85 academic year, as follows; “xxxxx” and “xxxxx”.”
“(Name) was enrolled in three of classes from September 1984 to June 1986 “xxx” and “xxx”.”
接下來，教授寫一些有關申請人在課堂上的表現，如完成的研究計劃、實驗室研究、研究報告、考試的成績、課堂態度、討論課的參與等，舉出實例。
“In my class (es), (name) did excellent work. She always listened attentively, participated activitely in class, and handed in very good written assignment.
“In particular, his/her research paper on (topic) was of exceptionally high quality, and showed that s/he fully understands and has a strong background in his/her field.”
如果推薦人是工作主管，首先一定要仔細陳述申請人的工作職責，并對美國研究生申請者工作表現作一評估。如果可能的話盡量列舉實例。
“When (name) held the position of (job title) in this company she was one s/he was one of my best employees. His/her job responsibilities included (describe them), and s/he carried out his/her duties with exceptional skill and professionalism.”
“S/he not only did his/her own work, but also helped other employees, and made many valuable contributions to the efficient running to our firm.”
以上就是有關專家整理的美國研究生申請推薦信字數格式的資訊，非常實用。
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