(1) Latitude zonality law (1), the isotherm in the southern region is basically east-west (parallel to the latitude) (1), and the temperature gradually decreases from the south to the north (1); Vertical zonality law (1), the temperature in the central region gradually decreases with the increase of altitude. (1) (***5)

(2) China has a large number of tourists and strong spending power (1), and Sansha City is close to the China tourism market, which is convenient for tourists (China and East Asia) (1); Basic conditions such as water, electricity and communication, and service facilities such as catering, transportation and accommodation are still lacking (1 point); The regional economy is still relatively backward, and the number of tourism management service personnel is insufficient (1 points) (***4 points)

(3) It is necessary to actively develop and make full use of tourism resources to create economic value (1 points), pay attention to ecological environment protection, reasonably arrange the capacity of tourists, strictly limit the behavior of tourists, and protect beautiful natural landscapes. (1 point) (***2 points)

Analysis of test questions:

(1) The zonality distribution law mainly includes latitude zonality (roughly east-west alternating to north and south, mainly influenced by latitude-solar radiation, which is caused by the heat difference caused by latitude difference), and the zonality law of dry humidity (roughly north-south alternating to east and west, mainly affected by the distance from the sea, is Vertical zonality (the change of water and heat with the change of altitude) and non-zonality (locality) correspond to zonality, which refers to the characteristics that the natural complex formed by the components of natural geographical environment and their interaction does not follow or deviate from the zonality law, or only refers to the local differences that are not distributed in strips. As can be seen from the figure, the closed isotherm distribution in the middle is vertical zonality, and the other general east-west trends are latitudinal zonality.

(2) The evaluation of tourism resources is mainly analyzed from five aspects: tourist value (regional combination and cluster status), market distance, traffic accessibility, environmental carrying capacity and regional reception capacity. Compared with Sansha City, China, Maldives, which is close to China and some Southeast Asian countries, there are more tourists from China. Maldives has been a tourist destination for a long time, with relatively perfect infrastructure and strong regional reception capacity.

(3) The common problems in the development of tourism include: environmental pollution, destruction of animal and plant resources, destruction of background environment, destruction of cultural relics and historical sites, impact on normal social order, etc. The topic gives that the tropical marine coral reef ecosystem is relatively fragile, so the development of tourism should not only actively develop and make full use of tourism resources to create economic value, but also pay attention to ecological environment protection, rationally arrange tourist capacity, strictly limit tourists' behavior, and protect beautiful natural landscapes.