1. box: boxes are generally used to mark important contents or parts that need to be emphasized, and can be indicated by square brackets "]" in references. For example:
-Yao Ming is a representative figure of basketball players in China [Yao Ming], who once played for Houston Rockets.
2. Roundness: Roundness is generally used to mark some special meanings or points, which can be indicated by brackets "()" in references. For example:
Many scholars believe that global warming has a far-reaching impact on human beings (Li, 20 10).
It should be noted that the use of boxes and circles should be as concise as possible and should not be overused or abused, so as not to affect the reading and understanding of the article. At the same time, when quoting documents, they should also be marked and typeset according to the standard format and requirements to ensure the accuracy and standardization of the cited documents.