Grouped option buttons must have consecutive tab indices. They are commonly encircled by a group box. If you have two groups of option buttons, you must insert a tab index between the tab indices of the two groups on the group frame.
分组选项字段的选项卡索引必须连续，它们周围通常会有一个组框。如果有两组选项字段，则需要在组框上两个组的选项卡索引之间再插入一个选项卡索引。