请您看下，我这个用ASP读取三级循环应该怎么写。主要是要判断结点数目。才好写循环次数
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]]> </RoomTypeDesc> </RoomType> - <RoomType> <RoomCode>DB006</RoomCode> <RoomName>大床房（含早）</RoomName> <TBTag /> <Exceptive>Y</Exceptive> <AgentCommisionRate>0.1</AgentCommisionRate> <TeamRoom>N</TeamRoom> <TeamRoomNum>0</TeamRoomNum> <Floor>3.4</Floor> <RoomArea>14</RoomArea> <NotAddBed>Y</NotAddBed> <BedType>大床</BedType> <Internet>宽带免费</Internet> - <RoomRates> - <RoomRate> <StartDay>20090915</StartDay> <EndDay>20091031</EndDay> <PaymentType>T</PaymentType> <DisplayPrice>199.0</DisplayPrice> <RateAmount>189.0</RateAmount> <BalPrice>189.0</BalPrice> <Meal>1</Meal> - <RoomQuotas> - <RoomQuota> <TheDate>20091031</TheDate> <CurrentNum>0</CurrentNum> </RoomQuota> </RoomQuotas> </RoomRate> </RoomRates> - <RoomTypeDesc> - <![CDATA[ 所在楼层:3.4;房型面积:14;床型:大床;床面积:1.5*2;宽带免费;房间无电脑;该房型不可加床; ]]> </RoomTypeDesc> </RoomType> - <RoomType> <RoomCode>DB007</RoomCode> <RoomName>商务大床房（含早）</RoomName> <TBTag /> <Exceptive>Y</Exceptive> <AgentCommisionRate>0.1</AgentCommisionRate> <TeamRoom>N</TeamRoom> <TeamRoomNum>0</TeamRoomNum> <Floor>3、4</Floor> <RoomArea>14</RoomArea> <NotAddBed>Y</NotAddBed> <BedType>大床</BedType> <Internet>宽带免费</Internet> - <RoomRates> - <RoomRate> <StartDay>20090915</StartDay> <EndDay>20091031</EndDay> <PaymentType>T</PaymentType> <DisplayPrice>219.0</DisplayPrice> <RateAmount>208.0</RateAmount> <BalPrice>208.0</BalPrice> <Meal>1</Meal> - <RoomQuotas> - <RoomQuota> <TheDate>20091031</TheDate> <CurrentNum>0</CurrentNum> </RoomQuota> </RoomQuotas> </RoomRate> </RoomRates> - <RoomTypeDesc> - <![CDATA[ 所在楼层:3、4;房型面积:14;床型:大床;床面积:1.8*2;宽带免费;房间无电脑;该房型不可加床; ]]> </RoomTypeDesc> </RoomType> - <RoomType> <RoomCode>DB008</RoomCode> <RoomName>标准房（双早）</RoomName> <TBTag /> <Exceptive>Y</Exceptive> <AgentCommisionRate>0.1</AgentCommisionRate> <TeamRoom>N</TeamRoom> <TeamRoomNum>0</TeamRoomNum> <Floor>3、4</Floor> <RoomArea>14</RoomArea> <NotAddBed>Y</NotAddBed> <BedType>双床</BedType> <Internet>宽带免费</Internet> - <RoomRates> - <RoomRate> <StartDay>20090915</StartDay> <EndDay>20091031</EndDay> <PaymentType>T</PaymentType> <DisplayPrice>219.0</DisplayPrice> <RateAmount>208.0</RateAmount> <BalPrice>208.0</BalPrice> <Meal>2</Meal> - <RoomQuotas> - <RoomQuota> <TheDate>20091031</TheDate> <CurrentNum>0</CurrentNum> </RoomQuota> </RoomQuotas> </RoomRate> </RoomRates> - <RoomTypeDesc> - <![CDATA[ 所在楼层:3、4;房型面积:14;床型:双床;床面积:1.2*2;宽带免费;房间无电脑;该房型不可加床; ]]> </RoomTypeDesc> </RoomType> - <RoomType> <RoomCode>DB004</RoomCode> <RoomName>特惠大床房(内宾)</RoomName> <TBTag /> <Exceptive>Y</Exceptive> <AgentCommisionRate>0.1</AgentCommisionRate> <TeamRoom>N</TeamRoom> <TeamRoomNum>0</TeamRoomNum> <Floor>3、4</Floor> <RoomArea>14</RoomArea> <NotAddBed>Y</NotAddBed> <BedType>大床</BedType> <Internet>宽带免费</Internet> - <RoomRates> - <RoomRate> <StartDay>20091014</StartDay> <EndDay>20091031</EndDay> <PaymentType>T</PaymentType> <DisplayPrice>199.0</DisplayPrice> <RateAmount>159.0</RateAmount> <BalPrice>159.0</BalPrice> <Meal>1</Meal> - <RoomQuotas> - <RoomQuota> <TheDate>20091031</TheDate> <CurrentNum>-3</CurrentNum> </RoomQuota> </RoomQuotas> </RoomRate> </RoomRates> - <RoomTypeDesc> - <![CDATA[ 所在楼层:3、4;房型面积:14;床型:大床;床面积:1.5*2;宽带免费;房间无电脑;该房型不可加床;窗户面对走道; ]]> </RoomTypeDesc> </RoomType> </RoomTypes> - <Additions> - <Addition> <Catogory>加床费用</Catogory> <RoomTypeCode>ALL</RoomTypeCode> <AddName>null</AddName> <SalePrice>80.0</SalePrice> <AddRemark /> </Addition> - <Addition> <Catogory>早餐费用</Catogory> <RoomTypeCode>ALL</RoomTypeCode> <AddName>自助早餐</AddName> <SalePrice>12.0</SalePrice> <AddRemark /> </Addition> - <Addition> <Catogory>接机费用</Catogory> <RoomTypeCode>ALL</RoomTypeCode> <AddName>无接机服务</AddName> <SalePrice>-1.0</SalePrice> <AddRemark /> </Addition> </Additions> </HotelRoomTypeInfo> </Data> </OTResponse>