public static String CalculateFixedAssets(Hashtable<Integer,Land> landList) {
		int AreaCount = 0;
		int CottageCount = 0;
		int HouseCount = 0;
		int SkyScrapperCount = 0;
		for(Iterator<Integer> it = landList.keySet().iterator(); it.hasNext();){
			int id = it.next();
			switch(landList.get(id).GetType()){
			case AREA:
				AreaCount++;
				break;
			case COTTAGE:
				CottageCount++;
				break;
			case HOUSE:
				HouseCount++;
				break;
			case SKYSCRAPPER:
				SkyScrapperCount++;
				break;
			}
		}
		
		return "地产：空地"+AreaCount+"处；茅屋"+CottageCount+"处；洋房"+HouseCount+"处；摩天楼"+SkyScrapperCount+"处。";
	}