题目

With over 2.4 millon visitors every year，Cinque Terre is one of the most-visited regions in Italy. Cinque Terre is truly special. The five candy-colored fishing villages of Riomaggiore，Manarola，Comiglia，Vemazza，and Monterosso al Mare are built into cliffs over the clean and brightly-shining Ligurian Sea. Whether you're visiting the region for a few days or a few weeks，these are the experiences you should add to your trip pleasure.★Take a scenic hike.It's easy to visit each of the attractive villages on foot. The most popular hike is the coastal path Sentiero Azzuro. It links all 不等式的解集为________．