中文摘要：

随着我国旅游业的快速发展，旅游安全问题也日益突出。川藏公路沿线以其丰富独特的旅游资源成为青藏高原精品旅游线路之一，然而区域内固有的恶劣自然条件和落后的基础设施成为沿线旅游安全的限制性因素。运用风险分析的基本理论和方法，选取了14个指标，对川藏公路沿线旅游安全风险进行了分析，结果表明：（1）川藏公路沿线中等及以上风险路段占总里程的74．9％，可以认为川藏公路沿线是一条高风险的旅游线路，尤其是横断山区的左贡一巴塘路段风险度最高；（2）川藏公路沿线丰富的旅游资源与旅游安全高风险之间相互对立，加强旅游安全风险管理势在必行。

英文摘要：

The tourism center is the core of tourism destination system, which is significant to the development of regional tourism. This paper eonfigurates the fraetal pattern of scale and spatial structure of touriam centers, and also has an empirical investigation of the tourism centers in Henan Province. The findings demonstrate that it is workable to apply the fractal theory to the scale and spatial structure of turism centers and there is a distinctively fraetal feature of the scale and spatial structure of turism centers in Henan Province. In the scale structure, Henan Province has formed six-level hierarchical scale system, which is taking Zhengzhou as the first tourism central place. In the spatial structure, the 18 tourism central places in Henan Province takes a relatively uniform spatial structure layout.