optimize think methods
optimize think methods

thinkjs/thinkjs,75team/thinkjs,akira-cn/thinkjs,maxzhang/thinkjs,Qihoo360/thinkjs,akira-cn/thinkjs,75team/thinkjs,snadn/thinkjs,75team/thinkjs,maxzhang/thinkjs,maxzhang/thinkjs,akira-cn/thinkjs