阅读下面的文字，完成下列小题。

                                                                                    清晨我漫步在山坡谷地，

                                                                                    晨光宣泄着永恒的秘密，

                                                                                    山涧里流倘出一条小溪，

                                                                                    她在歌、在唤、在吐露心曲：

                                                                                    生活并非安逸，

                                                                                    它是思念和希冀。

                                                                                    死亡并非哀歌，

                                                                                    它是失望与憔悴。

                                                                                    智者不在言词，

                                                                                    其秘密在言词背后藏nì。

                                                                                    伟人不在高位，

                                                                                    不屑权位者才配享荣誉。

                                                                                   （纪伯伦《小溪，你说什么》节选）

已知A,B分别为椭圆$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\left(a>b>0\right)$的左、右顶点，点C(0,b)，直线l：x=2a与轴交于点D，与直线AC交于点P．若$\angle DBP={60}^{°}$，则该椭圆的离心率为（  ）

已知：如图，四边形ABCD是⊙O的内接正方形，点P是劣弧上不同于点C的任意一点，则∠BPC的度数是（　　）