edltplus使用正则表达式替换多余空行

24-7
24-7
1.ADV	副词  连续发生地;不中断地;无休止地 If something happens 24-7, it happens all the time without ever stopping. 24-7 means twenty-four hours a day, seven days a week. 
 【搭配模式】：ADV after v
 【搭配模式】：ADJ n
 【语域标签】：mainly AM 主美
 【语域标签】：INFORMAL 非正式
•I feel like sleeping 24-7.我想一直睡下去。
24-7 is also an adjective.  
•...a 24-7 radio station.24 小时广播电台


911
911
1.NUM	数词  (美国的紧急求助电话号码) 911 is the number that you call in the United States in order to contact the emergency services. 
•The women made their first 911 call about a prowler at 12:46 a.m.那些女人在上午12 点 46分第一次打911报警说有小偷。

只想保留一行空格

ctrl + h

regular expression

^[ \t]*\n\n

\n