fix:修改范围

src/modules/home/Home.jsx

@@ -305,7 +305,7 @@ class Home extends React.Component {
                 >视频课</span>
               </div>
               <div className="study-select">
-                <span className="select-word">（{moment().subtract(timeRange, 'day').format('MM.DD')} ~ {moment().format('MM.DD')}）</span>
+                <span className="select-word">（{moment().subtract(timeRange - 1, 'day').format('MM.DD')} ~ {moment().format('MM.DD')}）</span>
                 <Select
                   style={{ width: 88 }}
                   value={timeRange}