模型是多时点did，请问大家命令中是否存在改进的空间使安慰剂检验的图片变美观，以下是我的作图命令：
twoway(scatter pvalue1 coef1,xlabel(-0.015(0.01)0.015,grid) yline(0.1,lp(shortdash)) xline(0.0128,lp(shortdash)) xtitle(估计系数) msymbol(smcircle_hollow) mcolor(red) legend(off))(kdensity coef1,yaxis(2) legend(off) title(个体安慰剂检验)), ytitle("p值",axis(1)) ytitle("核密度",axis(2))