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<!DOCTYPE html> <html> <head> <script> function myFunction() { alert("感谢您访问 BEGTUT！"); } </script> </head> <body onunload="myFunction()"> <h2>欢迎来到我的主页</h2> <p>关闭此窗口或按 F5 重新加载页面。</p> </body> </html>