Point prevalence estimates, 95% confidence intervals and design effects were calculated.
计算了点患病率估值、95%的置信区间和设计效应。
The researchers tested the subjects’ mental acuity at three-year intervals, and tracked their degree of adherence to the Mediterranean diet on a 55-point scale.
研究人员每隔三年会检测这些研究对象的心智敏锐程度，并采用55分为满分的问卷调查形式跟踪调查这些老年人对地中海饮食之坚持程度。
Major CentOS versions, which follow RHEL versioning, are only released every 2-3 years, while "point" releases (e.g. 5.1) tend to arrive in 6-9 month intervals.
Major CentOS的版本中，这些基于RHEL版本，每2—3年发布，而“点”版本(如5.1版本)往往相隔6—9个月的时间间隔。
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