If you often need to enter some regular sequence of text, such as numbers (1, 2 ...), date (1st, 2nd ...) , and so on, you can use the following method to implement its quick input:
1. First enter the first two elements of the text (such as "A, B") in the 1th or 22 cell where you want to enter the sequence text;
2. Select the two cells above and move the mouse over the lower right corner of cell 2nd into a fine crosshair (which we usually call the "fill handle"). Hold down the left mouse button and drag backward (or down) to the last cell that you want to fill in the sequence, and then release the left button, followed by the following elements of the sequence (such as "C, D, e ...") Automatically fill in the corresponding cells.