读北部湾经济区示意图，结合所学知识，完成下列要求。

（1）该区域位于湛江的       方向，主要的农业地域类型是                  ，农业发展过程中遇到的主要环境问题是             和                 。
（2）简要分析该区域发展工业的有利条件                                      
                                                                              
                                                                              
                                                                              
                                           。
（3）从可持续发展的角度，说明北部湾经济区经济发展的方向                     
                                                                              
                                                                              
                                                                              
                                                      。