You don't need professionals to answer your questions. The content of a cover letter is generally to express your desire to get a job, right? So it's best to put it on the first page so that the interviewer can understand your mood at a glance and then look back. But here's the theory. What other letters of recommendation are there? I guess you just graduated. The real job search is not like this. No one will read your cover letter, and no one will dump your recommendation letter. What people look at is just a piece of paper, which is the text of your resume, and the rest is the most obvious. The concept of resume is simple resume, and expressing the best meaning with the least words is the essence of classic resume, haha.