被子竟然也能「改變人生」？許多人在社群媒體上分享加重被（weighted blanket）如何改善了他們的睡眠品質，像是一場溫柔的擁抱，幫助身體放鬆、心情安定。但它真的有用嗎？本集一起來看看科學怎麼說！
📚 本集文法學習重點：
1️⃣ 現在完成式肯定句（Present perfect simple : affirmative）
例句：Some people say it has changed their sleep after only a few weeks.
2️⃣ 連接詞 that 的用法（Conjunction: that）
例句：A small study in Sweden showed that people using these blankets made more melatonin, a hormone that helps us sleep.
Story text :
There are posts on social media where people share how good weighted blankets are. Some people say it has changed their sleep after only a few weeks. But how does it work? Weighted blankets are heavier than normal blankets. They put gentle pressure on your body, like a hug. This helps you feel calm and relaxed. Some people sleep better and feel less anxious. A small study in Sweden showed that people using these blankets made more melatonin, a hormone that helps us sleep. But, they are not safe for everyone.
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