医生先了解了病人的生理状况，再决定用药方案。

Yīshēng xiān liǎojiě le bìngrén de shēnglǐ zhuàngkuàng, zài juédìng yòngyào fāng'àn.

The doctor first understood the patient's physical condition, then decided on a medication plan.

青少年的生理和心理都在快速变化。

Qīngshàonián de shēnglǐ hé xīnlǐ dōu zài kuàisù biànhuà.

Teenagers' physiology and psychology are both changing rapidly.

熬夜会打乱人的生理节律，影响健康。

Áoyè huì dǎluàn rén de shēnglǐ jiélǜ, yǐngxiǎng jiànkāng.

Staying up late disrupts people's biological rhythms and affects their health.