在每个公司中，随机组成了2人单位，总共有18个群体，其中258人为介入组，另外231人为对照组。
In each company, 2 comparable work units were randomly allocated, resulting in 18 clusters with 258 workers assigned to the intervention group and 231 workers to the control group.
在每个公司中，随机组成了2人单位，总共有18个群体，其中258人为介入组，另外231人为对照组。
In each company, 2 comparable work units were randomly allocated, resulting in 18 clusters with 258 workers assigned to the intervention group and 231 workers to the control group.
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