阅读下面这首诗，完成后面问题。
                                                                                      江亭夜月送别二首（其二）
                                                                                                    王勃
                                                                                               乱烟笼碧砌，
                                                                                               飞月向南端。
                                                                                               寂寞离亭掩，
                                                                                                江山此夜寒。

手偶然接触到针尖，便立即缩回，并会产生痛觉，产生痛觉的部位在（     ）

从海陆位置看，我国（　　）