建设中国特色社会主义，必须从中国的实际出发，请根据例子举例说明。

（1）依据现阶段生产力水平较低的国情，必须坚持以经济建设为中心。

（2）依据                                                               ，                                                                          。

（3）依据                                                               ，                                                                          。

（4）依据                                                               ，                                                                          。