单选题 A male patient, 65 years old, presents with redness, swelling, and pain in the right metatarsal bones and ankle joint. Diagnosed with gouty arthritis. The first-choice drug is ( ). (患者,男,65岁.右侧跖骨、踝关节红肿疼痛.诊断为痛风性关节炎.首选的治疗药物是) ( )