以下是一些四级万能结尾句模板，供您参考：
1. In conclusion, it is evident that [主题/观点] is crucial to [方面/方面]. Therefore, it is essential to [建议/措施] in order to [目的/效果].
2. In summary, the importance of [主题/观点] cannot be overstated. We must take [建议/措施] to ensure that [目的/效果].
3. Ultimately, [主题/观点] is paramount in [方面/方面]. Therefore, it is imperative to [建议/措施] in order to achieve the desired [目的/效果].
4. In conclusion, [主题/观点] holds the key to [方面/方面]. Therefore, it is crucial to [建议/措施] in order to [目的/效果].
5. In summary, [主题/观点] is paramount in [方面/方面]. We must take [建议/措施] to ensure that [目的/效果].
请注意，这些模板仅供参考，具体使用时需要根据您的文章内容和需求进行适当的修改和调整。
