阅读下面一首诗，完成下面题目。
                                                                                                                               无 题
                                                                                                                               李商隐
                                                                                                      相见时难别亦难，东风无力百花残。
                                                                                                      春蚕到死丝方尽，蜡炬成灰泪始干。
                                                                                                      晓镜但愁云鬓改，夜吟应觉月光寒。
                                                                                                       蓬山此去无多路，青鸟殷勤为探看。

明明踢毽子踢了185下，贝贝踢了94下，他们两人一共踢了____下。

若方程x²－2ax＋a＝0在(0，1)恰有一个解，求a的取值范围．