但是，当昨天该市开始在中学和高中进行保安随机抽检作为抓获这些“武器”的最后努力时，父母的期望和学校的规章之间的距离掀起轩然大波。

But as the city began random security scanning at middle and high schools yesterday in its latest effort to seize weapons, the gap between school rules and parents' expectations has set off a furor.

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方法：采取单纯随机采样法，抽检市售的15类食品并依据相关国家标准和地方标准检验方法进行检测。

Methods: 15 categories of sampled food were randomly selected from Wenling markets, and tested with both national and local criteria on food hygiene.

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研究方法随机抽取50家桶装饮用纯净水生产企业，用调查表对其进行现场卫生学调查，并汇总桶装饮用纯净水抽检结果，运用卫生统计学的方法对数据进行处理。

Methods We randomly pick sample of barreled drinking water from 50 different manufactories, fill out survey form, gather inspection results, process data by using sanitation statistics methods.

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