2010年1月，国务院发布《国务院关于推进海南国际旅游岛建设发展的若干意见》，海南国际旅游岛建设正式步入正轨。读图表资料，回答下列问题。


1．大陆游客与港澳台游客对海南省旅游需求的季节差异有何不同?为什么？
                                                                           
                                                                           
                                                                           
2．为什么五指山市的旅游人数1月份较7月份少？
                                                                           
                                                                           
3．从海南岛自然环境和所属文化区的特点评价其发展旅游业的有利条件。
                                                                           
                                                                           
                                                                           
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