范例：
期望的标题效果：Literature review & Research set-up
在Latex里写的标题：\section{Literature Review & Research Set-up}
运行后报错： Misplaced alignment tab character &
原因：
This error appears when the alignment character '&' is used incorrectly. The alignment character & is used to align elements in specific environments, such as matrix, align, table etc.
When you want to use an ampersand & as a text character in your writing, such as in a title, you must write it as \&.
If you fail to do this, you will get an error as shown below： ! Misplaced alignment tab character &.