text_1: 主要 结局 是 有 症状 且 经过 客观 证实 的 静脉 血栓 栓塞 , 包括 肺栓塞 或 深 静脉 血栓 形成 .
  
text_2: the primary outcome was symptomatic , objectively verified venous thromboembolism , which included pulmonary embolism or deep @-@ vein thrombosis .
  