How to identify the high-risk patients with atherothrombosis in time, and what roles on earth clopidogrel plays in patients primary and secondary prevention are all the problems to be investigated.

• 如何及时发现动脉粥样硬化血栓形成高危患者,氯吡格雷在这些患者二级和一级预防中究竟有哪些作用都是值得研究的问题。