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   1993篇
  免费   44篇
  国内免费   2篇
儿科学   14篇
妇产科学   992篇
基础医学   47篇
口腔科学   1篇
临床医学   144篇
内科学   24篇
皮肤病学   9篇
神经病学   4篇
特种医学   20篇
外科学   63篇
综合类   341篇
预防医学   135篇
眼科学   1篇
药学   110篇
  4篇
中国医学   93篇
肿瘤学   37篇
  2024年   5篇
  2023年   13篇
  2022年   29篇
  2021年   51篇
  2020年   35篇
  2019年   198篇
  2018年   113篇
  2017年   73篇
  2016年   23篇
  2015年   40篇
  2014年   87篇
  2013年   83篇
  2012年   101篇
  2011年   107篇
  2010年   99篇
  2009年   62篇
  2008年   44篇
  2007年   44篇
  2006年   38篇
  2005年   24篇
  2004年   22篇
  2003年   14篇
  2002年   8篇
  2001年   10篇
  2000年   8篇
  1999年   4篇
  1998年   2篇
  1997年   3篇
  1995年   1篇
  1994年   4篇
  1992年   1篇
  1991年   2篇
  1990年   2篇
  1989年   1篇
  1988年   2篇
  1986年   1篇
  1985年   30篇
  1984年   256篇
  1983年   50篇
  1982年   60篇
  1981年   51篇
  1980年   54篇
  1979年   44篇
  1978年   30篇
  1977年   20篇
  1976年   33篇
  1975年   21篇
  1974年   15篇
  1973年   21篇
排序方式: 共有2039条查询结果,搜索用时 0 毫秒
91.
A collection of neurological signs and symptoms, entitled abdominal pelvic pain syndrome, is identified as the most common cause of chronic pelvic pain. Techniques to identify abdominal wall, vaginal, and sacral components are described, with painful tissues commonly limited to a single dermatomic area. Superficial local areas of hyperpathia (trigger points) appeared not only to cause the pelvic pain but also to be responsive to local anesthetics for a duration in excess of the presence of the medication. Successful responses were noted in 89.3% of 131 patients, with 92.6% requiring five or fewer treatments and 68.2% followed up for longer than 6 months. The diagnosis of the abdominal pelvic pain syndrome is an important component in avoiding unnecessary operation in patients with pelvic pain.  相似文献   
92.
A total of 1140 aerobic and anaerobic isolates were recovered from cultures of specimens from the reproductive tracts of 435 uninfected patients who underwent elective hysterectomy. Standard minimum inhibitory concentration susceptibility studies were performed on these isolates to 13 newer penicillins, cephalosporins, and some traditional antimicrobial agents. These data were generated to evaluate the in vitro efficacy of these antibiotics for potential use in prophylaxis or as a single agent for treatment of polymicrobial infections of the female pelvis. The minimum inhibitory concentration data for each antibiotic against 16 genera of aerobic and nine genera of anaerobic bacteria were determined and were used to compare the in vitro antimicrobial activity of newer antibiotics to that of the more traditional antibiotics. Of the antimicrobial agents tested, piperacillin had the highest in vitro activity against these isolates of any antibiotic tested.  相似文献   
93.
94.
Growth retardation in the human fetus associated with maternal cardiovascular disease is frequently accompanied by birth asphyxia and perinatal mortality. We have investigated the cardiovascular responses to acute hypoxemia in the fetal lamb with growth retardation secondary to embolization of the uteroplacental vascular bed. In the basal period, fetal arterial PO2 and umbilical perfusion were significantly lower, and perfusion of the adrenal glands, brain, and heart was significantly higher, in embolized than in control fetal lambs. During imposed acute hypoxemia there was preferential perfusion of vital organs, the adrenal glands, brain, and heart in control and embolized fetuses. This preferential perfusion to the vital organs during hypoxemia was significantly more pronounced in embolized animals. Because of the increased compensation during acute hypoxemia, as reflected by the increased preferential perfusion of vital organs, the growth-retarded fetuses would probably decompensate sooner if the hypoxemia was prolonged.  相似文献   
95.
A case of isolated leptomeningeal recurrence of an epithelial ovarian cancer was recently diagnosed and treated successfully with methotrexate placed via an Ommaya reservoir in combination with radiation therapy. A review of the literature revealed no other cases of epithelial ovarian leptomeningeal malignancy similarly treated.  相似文献   
96.
An immunoradiometric assay with the use of a monoclonal antibody can detect an antigenic determinant (CA125) in peripheral blood from more than 80% of patients with epithelial ovarian cancer. In this report elevated levels of CA125 were detected in serum from patients with adenocarcinomas of the fallopian tube, endometrium, and endocervix. Among patients with endometrial cancer, CA125 levels were elevated in recurrent or disseminated disease but not with tumors confined to the uterus.  相似文献   
97.
98.
An epidemic of "childbed fever"   总被引:2,自引:0,他引:2  
Postpartum infection remains a cause of considerable maternal morbidity and occasional maternal mortality. Puerperal sepsis mediated by what is now known as group A beta-hemolytic streptococci or Streptococcus pyogenes was once a common and lethal nosocomial scourge. Fortunately, multiple developments have decreased the incidence and ameliorated the clinical course of group A beta-hemolytic streptococcal postpartum sepsis. Despite these developments, epidemic group A streptococcal sepsis still jeopardizes modern mothers. We describe an epidemic of five women with group A beta-hemolytic streptococci-mediated postpartum infections which occurred at Mather Air Force Base Hospital, Sacramento, California. The remarkable, yet characteristic signs, symptoms, and clinical course of these patients are briefly reviewed along with the epidemiologic methods which led to the discovery of the common nosocomial source. Familiarization of the clinical aspects of these patients and the methods used to eradicate this epidemic will facilitate the protection and care of other women. Unfortunately, modern mothers still remain in jeopardy from "childbed fever."  相似文献   
99.
Although it seems likely that some patients with unexplained repeated abortions have early or subclinical autoimmune disease, there are no reports on the incidence of autoimmune serologic abnormalities in such patients by use of a series of tests. This diagnosis would suggest a treatable etiology for reproductive loss. We performed 11 serologic autoimmune tests in sera from 14 patients with three or more unexplained abortions (group II) and compared these results to those of 16 control patients with an established diagnosis for repeated abortions (group I). The groups were similar in age, gravidity, number of spontaneous abortions and live births, and in the interval from last abortion to serum sampling. A positive antinuclear antibody test plus at least one other positive test was found in four of 14 (29%) patients in group II (p less than 0.05). The tests that identified all these patients included levels of antinuclear antibody, antibodies to DNA or extractable nuclear antigen, and low levels of complement 3.  相似文献   
100.
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