“奥运经济断层”现象的研究

文章对"奥运经济断层"的原因和对策进行了探讨,并结合北京的情况给出了判断:由于北京仍具备较大的经济发展空间,出现"奥运经济断层"的概率并不大,即使出现也不会过于严重,但目前仍应做好一些预防性的措施,主要是赛后场馆的充分利用和抑制房地产泡沫的问题。

大城市转型发展的误区规避:经济下滑与产业断层

我国大城市要在经济增速放缓期成功实现转型发展,须把握好产业升级的步骤、方向和时机。从国际经验看,服务业高端化和制造业高端化是国际大城市产业调整的两个方向,而高端服务业的发展有赖于制造业向高端化转型。我国大城市只有经历"提二进三",即在发展高端制造业基础上推进生产性服务业,才能在更高的层次上实现"退二进三",从而避免进入"过早‘去工业化’陷阱",防止出现经济失速、产业断层以及收入分配恶化。

广东经济“软着陆”后遭遇“断层”

进入90年代后,广东经济迎来了改革开放以来第四个经济周期的增长,GDP 从1990年谷底开始往上攀升,1992、1993年达到顶峰,增速高达22.1%和22.3%。过度的经济扩张引发物价迅速上涨和各种经济关系的紧张。为此国家和省从1993年下半年开始出台一系列紧缩性政策,促使经济'软着陆'。由此,广东经济在逐步走低中降至1996年 GDP 增长10.7%的较合理增长区间,商品零售物价也从1993年增长18.2%下降到1996年的4.4%。按照以往经济周期的一般走势,人们开始期盼新一轮经济扩张期的到来。可是。

政策偏差与交易民主——欧债危机根源的政治经济分析

欧债危机国政府债务的不可持续性,是这些国家公共支出持续膨胀和财政收入极度短缺共同作用的结果。通过跨国比较分析,本文发现,欧债危机并不是单纯由慷慨的福利政策导致的,也不是单纯由自由放任主义经济政策及其引发的经济断层导致的,而是两类政策长期不当组合的经济结果,这种长期的政策偏差才是引发欧债危机的真正根源,而政策偏差的产生和维系又根源于危机国的交易式民主政治体制。

Enhanced CT and CT virtual endoscopy in diagnosis of heterotopic pancreas

AIM:To improve the diagnosis of heterotopic pancreas by the use of contrastenhanced computed tomography(CT)imaging and CT virtual endoscopy(CTVE).METHODS:A total of six patients with heterotopic pancreas,as confirmed by clinical pathology and immunohistochemistry in the Sixth Affiliated People's Hospital of Shanghai Jiao Tong University,Shanghai,China,were included.Nonenhanced CT and enhanced CT scanning were performed,and the resulting images were reviewed and analyzed using threedimensional postprocessing software,including CTVE.RESULTS:Four males and two females were enrolled.Several heterotopic pancreas sites were involved;three occurred in the stomach,including the gastric antrum(n =2)and lesser curvature(n=1),and two were in the duodenal bulb.Only one case of heterotopic pancreas lesion occurred in the mesentery.Four cases had a solid yet soft tissue density that had a homogeneous pattern when viewed by enhanced CT.Additionally,their CT values were similar to that of the pancreas.The ducts of the heterotopic pancreas tissue,one of the characteristic CT features of heterotopic pancreas tissue,were detected in the CT images of two patients.CTVE images showed normal mucosa around the tissue,which is also an important indicator of a heterotopic pancreas.However,none of the CTVE images showed the typical signs of central dimpling or umbilication.CONCLUSION:CT,enhanced CT and CTVE techniques provide useful information about the location,growth pattern,vascularity,and condition of the gastrointestinal wall around heterotopic pancreatic tissue.

两座桥和奥巴马的崛起

为奥巴马撰写一部新传并非易事。 从《奥巴马凭什么赢》到《奥巴马：我的总统梦》再到《奥巴马制胜的营销密码》，奥巴马的书比比皆是。如何差异化生存，进而脱颖而出，极其考验作者的文笔与构思。