回複：485 ref , have aquestion

問pijiang老師，485 ref 中寫道: a currently dated letter or other evidence from your intended permanent employer that indicates your current position.....老板給出了一封信證明了現在工作（仍然在同一大學工作），所以就把老板信和體檢表郵回去了。
-It is OK just to provide the employment verification letter (You should have asked the Dean or the Dept Chair to provide this letter). So, do not worry.