Study on the economic and technical policies on the intensive utilization of water resources 并列题名：Study on the economic and trade policies of the South Pacific island countries 并列题名：Study on the ecological compensation system of the regional water resources Study on the economic and trade policies of the South Pacific island countries 并列题名：Research on the fiscal and taxation policies to promote the rational use of natural resources 并列题名：Research on the legal mechanism of the marketization of sea resources 并列题名：Study on social recommendation based on the association of users-resources 并列题名：Study on the influence mechanism and policies of entrepreneurial intentions among newly returnees