ureteral calculus

例句：

1. 1.The patient's urine output was significantly reduced after the operation.
   手术后，患者的尿量显著减少。
2. 2.Ureteral calculi are a common cause of urinary tract infections.
   输尿管结石是尿路感染的常见原因。
3. 3.The patient was admitted to the hospital for further treatment of the ureteral calculus.
   患者因输尿管结石被收治入院接受进一步治疗。