检查妇女的身体，应当由女性工作人员或者医师进行。
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There are some very legitimate and more durable uses of PRF in WebAuthn, specifically supporting credential managers and operating systems.
Part of the explanation for why so few users will need to verify their age is that Discord already uses an internal "age determination" system that looks at "how long your account has existed, whether you have a payment method on file, what types of servers you're in, and general patterns of account activity."