我在做数据的交叉合并  试了几次还是错误。求大神帮忙看看！
. joinby  family_id using child
file child.dta not found
r(601);


. joinby  family_id using use "D:\stata\data&logfil
> es\c2\案例数据\child.dta"
invalid '"D:\stata\data&logfiles\c2\案例数据\child.
> dta'
r(198);