text_1: 冠状动脉 左 主干 病变 患者 接受 PCI 或 CABG 血运重建 后 的 生存期 超过 仅 接受 药物 治疗 14 .
  
text_2: survival among patients with left main coronary artery disease is longer after revascularization with either PCI or CABG than with medical therapy alone.14
  