每年圣诞是购物的黄金时期，由于人们购买需求旺盛，联储相应地供给更多的货币。到了一月份再收回这些超额的货币。
The Fed always puts more currency into circulation during this prime shopping period because people demand it, and then withdraws the "excess" currency in January.
PTCA后白细胞的激活可能触发一系列病理生理联级反应，释放某些炎症介质，促进血管平滑肌增殖导致再狭窄；
Activation of leukocytes after PTCA can trigger a serial cascade of pathophysiologic reaction, releasing some inflammation intermediates lead to restenosis.
目的：探讨糖尿病合并冠心病老年患者支架植入术后三联抗血小板治疗对预防支架内血栓形成和再狭窄的有效性及安全性。
Objective: To investigate the safety and efficacy of triple antiplatelet therapy in aged patients with diabetes mellitus combined with coronary heart disease after percutaneous coronary intervention.
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