It can be an example of including emphasis, and getting "extra polite", as Josh61 states in his solution, but I feel there is certainly some added subtleties that happen to be worth pointing out.设置完成后，每次打开浏览器时，首页将自动显示为百度，这样您就可以快速访问您最常用的搜索引擎了。如果您更�