随着中央和内地省、市援藏工作的开展 ,从内地进入西藏 (青藏 )高原从事铁路、公路、水利和城建等工程人员越来越多。这些人员为群体性进入高原 ,并在较短时间内开始施工作业。由于高原空气稀薄 ,生存环境恶劣 ,加上施工人员进入高原习服时间短 ,施工劳动强度大 ,作业人员极易 With the aid work by the Central Government and the provinces and municipalities in the Mainland, there are more and more engineering personnel engaged in railway, highway, water conservancy and urban construction from the mainland to Tibet (Qinghai) Plateau. These people entered the plateau groupily and began construction work in a relatively short period of time. Due to the thin air in the plateau, poor living environment, and short construction time for the construction workers to enter the plateau, the construction labor intensity is large and the workers are extremely vulnerable