首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   78070篇
  免费   5382篇
  国内免费   1676篇
耳鼻咽喉   3120篇
儿科学   902篇
妇产科学   1518篇
基础医学   2206篇
口腔科学   3216篇
临床医学   7242篇
内科学   7849篇
皮肤病学   716篇
神经病学   2597篇
特种医学   1325篇
外国民族医学   20篇
外科学   26588篇
综合类   10439篇
现状与发展   7篇
一般理论   2篇
预防医学   2827篇
眼科学   4657篇
药学   3191篇
  176篇
中国医学   855篇
肿瘤学   5675篇
  2024年   270篇
  2023年   2127篇
  2022年   3323篇
  2021年   4331篇
  2020年   4226篇
  2019年   3589篇
  2018年   3424篇
  2017年   2964篇
  2016年   2955篇
  2015年   3036篇
  2014年   5868篇
  2013年   5550篇
  2012年   4413篇
  2011年   4628篇
  2010年   3685篇
  2009年   3485篇
  2008年   3334篇
  2007年   3331篇
  2006年   2906篇
  2005年   2548篇
  2004年   2208篇
  2003年   1800篇
  2002年   1415篇
  2001年   1339篇
  2000年   1159篇
  1999年   1053篇
  1998年   872篇
  1997年   833篇
  1996年   620篇
  1995年   509篇
  1994年   448篇
  1993年   365篇
  1992年   305篇
  1991年   304篇
  1990年   207篇
  1989年   199篇
  1988年   202篇
  1987年   201篇
  1986年   158篇
  1985年   178篇
  1984年   172篇
  1983年   111篇
  1982年   118篇
  1981年   99篇
  1980年   83篇
  1979年   49篇
  1978年   33篇
  1977年   34篇
  1976年   24篇
  1975年   20篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
Background: Increasingly larger series of laparoscopic fundoplications (LF) are being reported. A well-documented advantage of the laparoscopic approach is shortened hospital stay. Most centers report typical lengths of stay (LOS) for LF of 2–3 days. Our success with LF with a LOS of 1 day led to an attempt at performing LF on an ambulatory basis. Methods: Sixty-one consecutive patients with appropriate criteria for LF underwent surgery at our institution. Patients were counseled by the authors as to the usual postop course and progression of diet. All patients received preemptive analgesia (PEA) consisting of perioperative ketorolac and preincisional local infiltration with bupivicaine. Anesthetic management included induction with propofol, high-dose inhalational anesthetics, minimizing administration of parenteral narcotics, and avoidance of reversal of neuromuscular blockade. Immediate postop pain management included parenteral ketorolac and oral hydro- or oxycodone. All patients were given oral fluids and soft solids after transfer from the recovery room to the postoperative observation unit. Two patients were excluded from ambulatory consideration due to excessive driving distance from our hospital. Another two were hospitalized for observation after experiencing intraoperative technical problems. Results: Of 57 patients in whom same-day discharge was attempted, there were three failures requiring overnight hospitalization: All were due to pain and nausea; one patient also suffered transient urinary retention. There were no adverse outcomes related to early discharge, and there were no readmissions. One patient returned to the emergency room after delayed development of urinary retention. Median time from conclusion of operation to discharge was less than 5 h. No patients expressed dissatisfaction with early discharge on follow-up interview. Conclusions: LF can be safely performed as an ambulatory procedure. Analgesic and anesthetic management should be tailored to minimize nausea and provide adequate pain control. Received: 1 April 1996/Accepted: 29 May 1997  相似文献   
72.
73.
74.
75.
The purpose of this paper is to detail the contraindications for surgery, with curative intent for those patients who suffer from a head and neck malignancy that invades the intracranial space. This is based on a 30-year experience of over 250 patients. The most important contraindications are anatomical. Surgery is not done if the following structures are invaded: brain stem, eloquent portions of the cerebrum, superior sagittal sinus, both internal carotid arteries, both cavernous sinuses and certain vital bridging veins. Certain tumor factors are absolute but are occasionally relative contraindications: such as distant metastatic disease especially if multiple and at multiple anatomic sites. Some tumors that behave in a particularly virulent fashion that defy complete resection but are often difficult to predict preoperatively. Lack of patient medical fitness or absence of patient commitment to the operative procedure is make-up two serious contraindications to surgery. Presented at the 77th Annual Meeting of the German Society for Oto-Rhino-Laryngology, Head and Neck Surgery, 24–28 May 2006, Mannheim, Germany.  相似文献   
76.
Intra-articular fractures of the proximal tibia present a wide spectrum of injury patterns with associated soft tissue injury. The last two decades have seen the techniques of management evolve from extensive open reduction and rigid internal fixation to arthroscopy-assisted minimal invasive surgery (MIS) and biologically benign internal fixation. The ultimate aim is to prevent the occurrence of late degenerative arthritis. This could be achieved in selected patients using minimal invasive surgery, which offers the advantages of better visualisation and management of intra-articular soft tissue injuries, confirmation of fracture reduction viewed from the joint surface, faster rehabilitation and fewer wound complications.  相似文献   
77.
目的:为帮助腹腔镜胆囊手术病人掌握健康教育的知识.方法:开展了由腹腔镜手术后的病人向术前病人介绍手术感受.结果:促进术前病人对有关的健康教育知识的掌握,并能延长其术前1d晚的睡眠时间.结论:使病人更好地掌握健康宣教知识,有利于病人的治疗.  相似文献   
78.
BACKGROUND: The aim of this study was to determine the effect of laser refractive surgery on the offensive performance of professional baseball players. METHODS: Extensive search of the public media was conducted to determine which major league baseball players had undergone laser refractive surgery and when the procedure was performed. Baseball performance data were then used to determine presurgery and postsurgery baseball performance averages. A total of 17 position players were identified; however, 5 of these players were not considered in the analysis owing to insufficient playing experience either before or after the laser procedure. RESULTS: No statistically significant or practically significant difference was found between the presurgery and postsurgery means on either on-base percentage (P = 0.31), batting average (P = 0.39), slugging percentage (P = 0.66) or on-base plus slugging (OPS; P = 0.997) of major league baseball players. CONCLUSIONS: These preliminary findings suggest that professional baseball players should not expect a laser refractive surgical procedure to significantly improve their offensive baseball performance, despite the elimination of glasses or contact lens wear.  相似文献   
79.
Summary The clinical features and histological appearance of desmoplastic malignant melanoma are presented. Aggressive surgical management and close follow-up are mandatory if this highly aggressive tumor is to be controlled. Despite this, the prognosis is poor.  相似文献   
80.
Zusammenfassung Die Indikation zur Operation bei der AHNP ist bestimmt durch den Schweregrad und die Verlaufsdynamik der Erkrankung: Beides muß täglich neu kontrolliert und abgeschätzt werden, wobei hilfreiche Parameter vor allem das klinische Bild und einfache Labordaten sind. Die Computertomographie trägt nur bedingt zur Indikation bei. Eine Frühoperation ist indiziert bei Versagen der Intensivtherapie, Sepsis und vor allem bei drohender Nieren- und Lungeninsuffizienz. Eine Operation im postakuten Stadium sollte ebenfalls bei septischen Komplikationen durchgeführt werden. Engmaschige Verlaufskontrollen sind hier erforderlich.
Indication for surgery in acute pancreatitis
Summary The indication for surgery in acute hemorrhagic necrotizing pancreatitis (AHNP) depends on the severity of the disease and the clinical course. Both factors must be determined daily, based on clinical and laboratory data. CAT-scan does not contribute much to indication. An early operation is necessary if despite an optimal intensive care septic symptoms and signs persist and renal and respiratory failure occur. Surgery is indicated 2–3 weeks after onset of AHNP if septic complications (re)-occur. A close follow up is mandatory.
  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号