我在 Angular 应用程序中安装了 Material UI 现在我收到错误没有导出成员 Observable 错误，
我删除了节点模块并重新安装，问题仍然存在
ERROR in node_modules/@angular/material/autocomplete/typings/autocomplete-trigger.d.ts(14,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Observable"' has no exported member 'Observable'.
node_modules/@angular/material/chips/typings/chip-list.d.ts(15,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Observable"' has no exported member 'Observable'.
node_modules/@angular/material/chips/typings/chip.d.ts(11,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Subject"' has no exported member 'Subject'.
node_modules/@angular/material/core/typings/common-behaviors/error-state.d.ts(11,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Subject"' has no exported member 'Subject'.
node_modules/@angular/material/core/typings/common-behaviors/initialized.d.ts(9,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Observable"' has no exported member 'Observable'.
node_modules/@angular/material/core/typings/datetime/date-adapter.d.ts(9,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Observable"' has no exported member 'Observable'.
node_modules/@angular/material/core/typings/datetime/date-adapter.d.ts(10,10): error TS2305: Module '"D:/angular2/ang/node_modules/rxjs/Subject"' has no exported member …angular ×1