单选题 A urinalysis performed on a 27-year-old woman yields the following results: specific gravity: 1.008 pH: 5.0 protein: 2+ glucose: negative ketones: negative bilirubin: negative blood: 3+ nitrite: negative leukocytes: positive urobilinogen: 0.1 EU/dL Microscopic findings WBC/hpf: 10-15 RBC/hpf: 30-55 casts/lpf: Hyaline, 5-7; RBC, 2-5; granular, 2-3 uric acid crystals: moderate These findings are most consistent with