This is generally because English punctuation is used, and there is no space behind it. If English punctuation is used without spaces, when there are numbers or letters before and after punctuation, it will default to a whole (such as the red part of the icon below) and will not break lines in the middle of this whole. The alignment of the paper is "alignment at both ends", which will cause inconsistent word spacing. There are two ways to solve this problem: ① in Duan->; In "Line breaks and pagination", it is not recommended to check "Allow western languages to line break in the middle of words". If there are English quotations, it will lead to intermittent lines in the word, and hyphens are needed. (2) manually add spaces after punctuation, pay attention to the consistency of the whole text. If there are many contents, use the "replace" function; If the content is small, you can add it manually while checking.

When writing a reference in Word, English appears, so the contents of the reference cannot be written on one line.

There will be a particularly large space between words.