这里地势陡险，山岭连绵，重峦叠嶂，危岩耸突，峭壁如削，空气稀薄，天气变化无常。
B-Location I-Location B-Thing I-Thing O O O B-Thing I-Thing O O O B-Thing I-Thing I-Thing I-Thing O B-Thing I-Thing O O O B-Thing I-Thing O O O B-Thing I-Thing O O O O O O O O O O