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我的网站有时似乎正常加载（在 3 秒内），而其他时候加载大约需要 25-30 秒。我无法理解为什么会发生这种情况。我附上了一些截图，GTMETRIX 结果的链接是：https ://gtmetrix.com/reports/www.docbot.org/m3KZ2qXV
有人可以帮帮我吗？