Step 1: Meaning.
Regionalism is the feeling of preference for one's own region at the cost of national unity. It may arise from economic disparity, cultural identity, or political neglect.
Step 2: Problems caused.
It can lead to separatist tendencies, inter-state conflicts, and weakened national integration.
Step 3: Measures to control.
\begin{itemize}
\item Ensure equitable development of all regions.
\item Promote national identity through education and culture.
\item Decentralize power to give regions autonomy.
\item Use fair resource allocation and reduce inter-state disputes.
\end{itemize}
Final Answer: \[ \boxed{\text{Regionalism = loyalty to region; controlled by equity, integration, and fair policies}} \]
Translate the following passage into English: to be translated
Translate the following into English:
Translate the following passage into English: