尊重他人隐私，从道德角度讲，需要强化公民（    ）

阅读下面的诗歌。
                                                                                              滁州西涧
                                                                                                韦应物
                                                                                        独怜幽草涧边生，
                                                                                       上有黄鹂深树鸣。
                                                                                       春潮带雨晚来急，
                                                                                        野渡无人舟自横。

记不等式组$\left\{\begin{array}{c}x\ge 0\\ x+3y\ge 4\\ 3x+y\le 4\end{array}\right.$所表示的平面区域为D．若直线y=a（x+1）与D有公共点，则a的取值范围是____ ．