至

他去不去我不知道，至于我，我肯定会去的。

tā qù bù qù wǒ bù zhī dào zhì yú wǒ wǒ kěn dìng huì qù de

I don't know whether he'll go or not, but as for me, I'll definitely go.

这个问题至关重要，我们必须认真对待。

zhè ge wèn tí zhì guān zhòng yào wǒ men bì xū rèn zhēn duì dài

This issue is crucial, we must treat it seriously.

这个问题影响到学生、老师，乃至整个学校。

zhè ge wèn tí yǐng xiǎng dào xué sheng lǎo shī nǎi zhì zhěng ge xué xiào

This problem affects students, teachers, and even the entire school.

她太累了，以至于在会议上睡着了。

tā tài lèi le yǐ zhì yú zài huì yì shàng shuì zháo le

She was so tired that she fell asleep during the meeting.

母亲对孩子的照顾总是无微不至。

mǔ qīn duì hái zi de zhào gu zǒng shì wú wēi bù zhì

A mother's care for her children is always meticulous in every detail.

他工作直至深夜。

tā gōng zuò zhí zhì shēn yè

He worked until late at night.

他自始至终都没有放弃。

tā zì shǐ zhì zhōng dōu méi yǒu fàng qì

He never gave up from beginning to end.

至此，这个项目已经完成了。

zhì cǐ zhè ge xiàng mù yǐ jīng wán chéng le

Up to this point, this project has been completed.