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   What does it feel like to break a bone (骨头)? It’s different for everyone, but the pain is often sharp (严重). If the break is small, however, the person may not feel much pain at all. If you think that you or someone else has broken a bone, the most important things to do are to stay calm, make the hurt person comfortable, and call the doctor. Do not move the injured body part since movement could make it worse.
To treat the break, the doctor will need to take an X-ray. This gives the doctor the information he or she needs to set (接上) the bone: to put it back to its normal place. If the bone is large or it is broken in more than one place, the doctor may need to use metal pins (钢钉) to set it. After the bone has been set, the next step is usually putting on a cast, the special, hard thing that will keep the bone in place for a month or two.
   ypur bones are excellent at healing themselves. Broken bones will produce many new cells (细胞) and tiny blood vessels (血脉). These cover both ends of the broken part, and close up the break until the bone is as whole and strong as before.

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材料一:邻里相望,鸡犬相闻的美好愿景,在城市的钢筋水泥里渐行渐远。在过去的一年多,一款名为“楼里”的手机应用正试图在北京上万个小区,构建一种新型的邻里关系——社区共享。

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材料二:北京某社区民警,通过“楼里”APP向辖区居民分享了一则“警情提示”,通报社区里发生的3起入室盗窃案,提示居民睡前关窗锁门,公布民警联络电话。随后,该社区4000多位注册用户收到楼里推送的紧急通知。

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