今天无意翻看了下 V2EX 的 API。 发现一个查询用户接口，随手请求了一下 https://www.v2ex.com/api/members/show.json?id=100000 返回：
{"username": "100000", "website": "", "github": "", "psn": "", "avatar_normal": "//cdn.v2ex.com/gravatar/d71b9279ed6e2cb93c44d506dba2b63d?s=24&d=retro", "bio": "", "url": "https://www.v2ex.com/u/100000", "tagline": "", "twitter": "", "created": 1424830876, "status": "found", "avatar_large": "//cdn.v2ex.com/gravatar/d71b9279ed6e2cb93c44d506dba2b63d?s=24&d=retro", "avatar_mini": "//cdn.v2ex.com/gravatar/d71b9279ed6e2cb93c44d506dba2b63d?s=24&d=retro", "location": "", "btc": "", "id": 100000}
那。。。它怎么知道自己是 id 第 100000 然后起用户名为 100000，还是说内部账号。。
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