在国际经验中，当一个国家人均预期寿命突破75岁后，每提升0.1岁都需要支付指数级增长的治理成本。而要在未来五年内完成这最后一公里的冲刺，中国不仅要打破"东西分化"的健康地理学鸿沟，更需撬动万亿级银发经济的新动能。
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
，这一点在谷歌浏览器下载中也有详细论述
时间不逝，圆圈不圆，像是个轮回。
Those companies knew they had a captive audience, so they bought up as many journals as they could. Journal articles aren’t interchangeable commodities like corn or soybeans—if your science supplier starts gouging you, you can’t just switch to a new one. Adding to this lock-in effect, publishing in “high-impact” journals became the key to success in science, which meant if you wanted to move up, your university had to pay up. So, even as the internet made it much cheaper to produce a journal, publishers made it much more expensive to subscribe to one.