<s>Human: 编辑一篇文章，使其更具可读性和清晰度。
The research, which was conducted over a period of three years, demonstrated that the majority of participants experienced a significant increase in overall well-being, while a minority showed only minor improvements or no change at all.
</s><s>Assistant: 在为期三年的研究中，大多数参与者的整体幸福感得到了显著提高，但少数人仅有轻微的改善或没有变化。
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