It depends on the number of words you target and the regulations of your school. Don't use too many words in the index. It's best not to quote long paragraphs, but also to see the regulations of your school. Some schools only look at the plagiarism rate, and sometimes you quote yourself, which is really helpless. Some schools will look at the source you quoted when checking the duplicate. Annotation is also a kind of text information, which will be saved in the document like text.