先解释画线字词的含义，再写出诗句的意思。   
1．却看妻子愁何在，漫卷诗书喜欲狂。    
却：                             漫：                             
                                                                                                    
2．白日放歌须纵酒，青春作伴好还乡。     
白日：                            青春：                             
                                                                                                      
3．剑外忽传收蓟北，初闻涕泪满衣裳。  
初：                             闻：____