The quick act of changing your password will help your email remain private.

经常更改密码可以帮助您保证电子邮件的保密性。

youdao

Other basic account-related features will be accessible such as changing or ‘remembering’ your password and disabling sync on the computer in use.

在Ubuntu One控制面板中，你也可以很容易使用其他有关的账户管理功能，比如改变密码和记住密码、停止同步等。

youdao

Changing your password often, also helps.

BBC: A teen guide to staying safe online

In the meantime, we suggest changing your Tumblr password (though there's no indication that passwords were necessarily taken, or any other personal information) and staying away from the site until the all clear is given.

ENGADGET: Hacker group rewriting Tumblr pages into a racist, anti-gay screed (update: Tumblr says it's fixed)