4.
在平面直角坐标系\(xOy\)中,已知两定点\(M(0,- \dfrac {1}{3})\),\(N(0, \dfrac {1}{3})\),平面内的动点\(P\)在\(u\)轴上的射影为\(P_{1}\),且\(| \overrightarrow{MN}+ \overrightarrow{MP_{1}}|=| \overrightarrow{NM}+ \overrightarrow{NP}|\),记点\(P\)的轨迹为\(C\).
\((\)Ⅰ\()\)求点\(P\)的轨迹方程\(C\);
\((\)Ⅱ\()\)设点\(F(0,1)\),\(A(2,1)\)以\(A\)为圆心,\(|AF|\)为半径的圆\(A\)与直线\(y=-1\)相切于点\(B\),过\(F\)作斜率大于\(0\)的直线与曲线\(C\)在第一象限交于点\(Q\),与圆\(A\)交于点\(H\)若直线\(QH\),\(QA\),\(QB\)的斜率成等差数列,且\(E\)为\(QB\)的中点,求\(\triangle QFB\)和\(\triangle QHE\)的面积比.