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在 WPF 中，“选项卡控件”有两个“选项卡项”。第二个选项卡项有一个 WebBrowser 控件来显示网页。在第二个选项卡项中，单击网页内部/向下滚动网页并移动到第一个选项卡项并单击它。它不起作用（可能焦点仍在网页中）。如何让它工作？