2020-12-11 把latex源文件中，所有汉字开头的行前，

cat zmother.tex | grep -B 100000 "begin.document" > z.tex

  cat zmother.tex -n | grep -A 100000000 "begin.document" | sed '1d'  \

    | LANG=C  sed 's/^ *\([0-9]*[ \t]*\)\([\x80-\xff]\)/\\marginpar{\\boxed{\1}}\2/g' | sed 's/^ *[0-9]*[ \t]*\\/\\/g' \

    | sed 's/^ *[0-9]*[ \t]*//g' > 1

  cat 1 >> z.tex