====== extractTopic ======
===== Description =====
Extract tweet content

===== Paramters =====
1. name: searchStr type: string description: string need to search;

2. name: Stkcd type: int description: current Stkcd; 

3. name: unicodePage type: string description: unicode html already download;

4. name: firstPage type: boolean description: whether this page is first page of this company

===== Return =====
True, description: finished this page; 

False, description: failed this page

===== Detail Information =====

===== Changelog =====