Girl died from sepsis after GP sent her home twice
这项研究提示，如果在30-50多岁时就进行规律的有氧运动，或许就能延缓甚至降低人晚年出现认知衰退和老年痴呆的风险。规律的有氧运动包括中高强度有氧运动，中等强度运动表现为能说话但不能唱歌（如快走、慢跑、骑行、泳泳）；高强度运动表现为心率极快、呼吸急促，难以持续交谈（如快速跑步、竞速骑行）。建议每周至少150分钟中等强度或75分钟高强度运动。。新收录的资料对此有专业解读
This includes expertise vital to keeping the oil pumps working: with the skilled engineers formerly on the PDVSA payroll now plying their trade elsewhere, the system limps on with a skeleton staff.，更多细节参见新收录的资料
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