医生经常给类风湿性关节炎患者开氯喹来缓解症状。

Doctors often prescribe ___chloroquine to rheumatoid arthritis patients for symptom relief.

在疟疾流行地区，医生经常建议将氯喹作为预防药物服用。

Doctors in malaria-endemic areas often recommend taking ___chloroquine as a preventive medication.