实战应用：根据数据特点选择合适算法
Privacy policy — This is something that some users might take for granted, but you need to pay special attention to the data-handling, storage, and usage practices of a VPN. These practices should be clearly laid out in a privacy policy, and if they aren't, you should not subscribe. Most VPNs require access to your IP address, online transactions, and browsing history, plus your personal details when you sign up. Your favorite VPN should not store these details under any circumstances, as that would negate the whole anonymity thing.
，这一点在91视频中也有详细论述
「香港政府肯定想令我噤聲。他們想我停止發聲，」她說。「但顯然，他們失敗了。我現在正跟你說話。」
Here's how each policy behaves when a producer writes faster than the consumer reads: