已知中国境内家马的出现，大约晚至距今4000年的黄河上游地区，例如属于齐家文化的甘肃永靖大何庄遗址、玉门火烧沟遗址等。而黄河中下游地区出现家马，则更晚至商代晚期的安阳殷墟遗址。
Public health consultant Dr Ross Keat said supporting people earlier to make small preventative changes would make "a big difference later on".
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Resident doctors also have little control on where and when they are asked to work, and say that the need to do placements in different parts of the country can be expensive.，详情可参考爱思助手下载最新版本