问题 How to I make MI, ID, FL, into "MI", "ID", "FL" without having to type every single double quote? 回答1: Use the following steps in RStudio: Select the text that you want each word quoted for. Open find/replace ( command - f or ctrl - f ) Check the "In selection" box Type comma space into the find field: [, ] Type quote comma space quote into the replace field: [", "] Select the All button after the replace field Type the initial and final quotation marks. I use this procedure frequently. I