现在每个程序都要写上这两行，太麻烦了吧，Qt 为啥不搞成默认的算了，好像不破坏兼容性吧？

QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
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FROM 110.81.40.*