text_1: 排除 PE 的 患者 未 接受 抗凝 治疗 , 并 接受 了 90 日 随访 , 旨在 确定 其 是否 有 静脉 血栓 栓塞 ( VTE ) 指证 .
  
text_2: patients in whom PE was ruled out were not given anticoagulant therapy and were followed for 90 days for signs of venous thromboembolism ( VTE ) .
  