The noun 患者 (huànzhě) means "patient" and refers to a person who is suffering from an illness or medical condition. It is a formal term commonly used in medical, legal, and news contexts, as opposed to the more colloquial 病人 (bìngrén).
医生建议患者多休息,避免剧烈运动。
yīshēng jiànyì huànzhě duō xiūxi, bìmiǎn jùliè yùndòng.
The doctor advised the patient to rest more and avoid strenuous exercise.
这种新药已经帮助了数千名患者恢复健康。
zhè zhǒng xīn yào yǐjīng bāngzhù le shù qiān míng huànzhě huīfù jiànkāng.
This new medicine has already helped thousands of patients recover their health.
患者的家属对治疗方案表示认可。
huànzhě de jiāshǔ duì zhìliáo fāng'àn biǎoshì rènkě.
The patient's family members expressed approval of the treatment plan.