When using Code Completion, you can accept the currently highlighted
selection in the popup list with the period character (.), comma (,),
semicolon (;), space and other characters.
The selected name is automatically entered in the editor followed by
the entered character.

用代码补全的时候，你可以用句号(.)，逗号，分号，空格和其他字符来选中当前高亮的条目。被选中的内容自动插入编辑器中，你用来选择的字符紧随其后。