假设你们学校的外籍朋友Miss Green要到海南岛旅游度假, 她向你(Zhang Ming)了解情况。请你为她写一段简要的介绍, 内容包括：
1.海南岛的地理位置、自然条件；
2.海南岛度假的活动内容：钓鱼、游泳、潜水、冲浪、游览亚热带风光等；
3.度假的必备物品：太阳镜、雨伞、太阳帽等。
Island Hainan is in the south part of our country. The weather there is pretty pleasant.
Hai Kou city is the capital of Hainan Province while it is also the biggest city on the island. There, you could either go visit the flower ma
