今天想检索下关于字符‘@’在英文论文中的用法，结果直接输入搜索框根本搜索不到。
经过调查发现，google 需要再搜索内容上加方括号[];
例如搜索‘@’，就搜索[@]。
For those seeking answers to technical queries, Google just upped its search game. Now for queries containing sequences of 2-3 special characters such as [== vs ===] and [+=], Google will return results on the meaning of these sequences in programming languages. 附上官方链接https://blog.google/products/search/improvements-searching-special-characters-programming-languages/