戒尺

nǐ fàn le rú cǐ dà de cuò wù guāng yòng jiè chǐ bù néng jiě jué wèn tí

你犯了如此大的错误，光用戒尺不能解决问题。

No mere ferule will answer for this offence.

xiǎo shí hou tā méi shǎo bèi lǎo shī yòng jiè chǐ dǎ

小时候他没少被老师用戒尺打。

The teacher often beat him with a ferule when he was young.