锁好门窗是防止入室盗窃的基本预防措施。

Locking doors and windows is a basic ___precaution against burglary.

医生建议我们在雷雨天气关闭电器作为安全预防措施。

The doctor advised us to turn off electrical appliances during thunderstorms as a ___precaution.

为了安全起见，他们采取了额外的预防措施。

They took extra ___precautions as a safety measure.