他做事一丝不苟，从不马虎。

Tā zuòshì yìsībùgǒu, cóng bù mǎhu.

He is meticulous in his work and never careless.

这位医生对每一份病历都一丝不苟地检查。

Zhè wèi yīshēng duì měi yí fèn bìnglì dōu yìsībùgǒu de jiǎnchá.

This doctor carefully checks every medical record.

在安全问题上，我们必须一丝不苟，不能有任何疏忽。

Zài ānquán wèntí shàng, wǒmen bìxū yìsī bùgǒu, bù néng yǒu rènhé shūhu.

On safety issues, we must be absolutely meticulous and allow no negligence.