過去一年尤其動盪。里亞爾暴跌引發12月下旬德黑蘭巴扎（bazaar）的抗議並迅速蔓延全國；安全部隊進行殘酷鎮壓，造成數千人死亡。其後里亞爾持續走弱，物價進一步攀升。
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12月19日，北京口腔医院新建主院区，患者在院内接受治疗。本版图片/北京口腔医院供图
Google Messages already has a location-sharing feature, but it's more for dropping a static pin on a map. That's fine if you're staying in the same spot, but not much use if you're on the go. The difference here is that the new option updates your location as you move, making it much easier to connect with someone.