cd "C:\Documents and Settings\Administrator.WWW-0C9E24528C2\桌面"
import excel using "data.xls",clear firstrow
save data,replace
use data,clear
sort daima year month day
duplicates drop year month day,force
capture drop obs
bysort year month :gen obs=_n
keep if obs==10
keep date
merge 1:m date using data
keep if _merge==3
sort year month day
drop _merge
save date10,replace
撤销:Ctrl/Command + Z
重做:Ctrl/Command + Y
加粗:Ctrl/Command + B
斜体:Ctrl/Command + I
标题:Ctrl/Command + Shift + H
无序列表:Ctrl/Command + Shift + U
有序列表:Ctrl/Command + Shift + O
检查列表:Ctrl/Command + Shift + C
插入代码:Ctrl/Command + Shift + K
插入链接:Ctrl/Command + Shift + L
插入图片:Ctrl/Command + Shift + G