Then after the end of the guidance, statistical analysis of the three groups' former scores and subsequent scores is taken. After three months and a half, a tracking survey conducted was done.

在辅导结束后对实验组、对照组和控制组的前后测成绩分别进行统计分析，并在三个月后进行了追踪调查。

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Subsequent reports from the US Geological Survey (USGS) place the magnitude of the tremor at 4.2 on the Richter scale.

来自美国地质勘探局(usgs)的后来的报告估计4.2里氏震级的震动。

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