After the articles in PDF format are converted into TXT documents and then copied into WPS, each line of text looks only half a line. Finding 1 to replace p is invalid. How to quickly typeset?

Judging from the picture, the article is not long. Please operate by hand.

I do this in Word:

1. Manually add 1 carriage return after each paragraph, so that there are only two carriage returns after each paragraph;

2. Replace two consecutive carriage returns (marks between paragraphs, p p) with manual line breaks (L);

3. Replace 1 carriage return (line break, p) with spaces (none, non-spaces), and the lines are connected at this time;

4. Replace the manual line break (L) with the carriage return (P).