全文获取类型
收费全文 | 6385篇 |
免费 | 509篇 |
国内免费 | 100篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 240篇 |
妇产科学 | 185篇 |
基础医学 | 817篇 |
口腔科学 | 116篇 |
临床医学 | 695篇 |
内科学 | 1516篇 |
皮肤病学 | 51篇 |
神经病学 | 499篇 |
特种医学 | 316篇 |
外国民族医学 | 1篇 |
外科学 | 940篇 |
综合类 | 106篇 |
一般理论 | 1篇 |
预防医学 | 478篇 |
眼科学 | 105篇 |
药学 | 378篇 |
中国医学 | 7篇 |
肿瘤学 | 497篇 |
出版年
2021年 | 72篇 |
2019年 | 67篇 |
2018年 | 90篇 |
2017年 | 66篇 |
2016年 | 82篇 |
2015年 | 108篇 |
2014年 | 122篇 |
2013年 | 182篇 |
2012年 | 272篇 |
2011年 | 261篇 |
2010年 | 173篇 |
2009年 | 164篇 |
2008年 | 252篇 |
2007年 | 289篇 |
2006年 | 262篇 |
2005年 | 282篇 |
2004年 | 244篇 |
2003年 | 207篇 |
2002年 | 226篇 |
2001年 | 225篇 |
2000年 | 182篇 |
1999年 | 173篇 |
1998年 | 109篇 |
1997年 | 88篇 |
1996年 | 89篇 |
1995年 | 93篇 |
1994年 | 82篇 |
1993年 | 76篇 |
1992年 | 175篇 |
1991年 | 170篇 |
1990年 | 143篇 |
1989年 | 167篇 |
1988年 | 149篇 |
1987年 | 163篇 |
1986年 | 130篇 |
1985年 | 124篇 |
1984年 | 107篇 |
1983年 | 75篇 |
1982年 | 61篇 |
1981年 | 46篇 |
1980年 | 49篇 |
1979年 | 65篇 |
1978年 | 58篇 |
1977年 | 49篇 |
1976年 | 51篇 |
1975年 | 53篇 |
1974年 | 59篇 |
1973年 | 47篇 |
1971年 | 41篇 |
1969年 | 41篇 |
排序方式: 共有6994条查询结果,搜索用时 15 毫秒
1.
2.
3.
Symptomatic and Clinical Improvement in Morbidly Obese Patients with Gastroesophageal Reflux Disease Following Roux-en-Y Gastric Bypass 总被引:3,自引:0,他引:3
Background: Patients who suffer with gastroesophageal reflux Disease (GERD) endure a worsening of symptoms as their weight
increases. When medical treatment of this condition in the morbidly obese patients fails, surgical intervention may be indicated.
Choosing a procedure which not only helps achieve weight control but which also relieves symptoms and complications of GERD
is the goal. We present a review of patients who have undergone Roux-en-Y Gastric Bypass (RYGBP) and related procedures for
this disease. Methods: One hundred eighty-eight patients undergoing surgery for morbid obesity and for GERD in 1992-1996 were
contacted by mail or phone. All of these patients had undergone preoperative esophagogastroduodenoscopy to grade the severity
of their disease. Their preoperative symptoms were compared to those experienced postoperatively. Results: One hundred thirty
patients underwent a RYGBP with modified Hill fundopexy, 22 patients underwent a distal gastrectomy with modified Hill fundopexy,
8 patients underwent distal gastrectomy alone and 28 patients underwent RYGBP alone. There have been no deaths. There were
nine surgical complications, eight early and one at 2.5 years postoperation. Follow-up is 4-48 months. The average BMI dropped
from 43 to 30.2 kg/m2. Whereas all patients were on some form of medical therapy before surgery, only 14 reported the need for medication postoperatively.
Conclusions: Surgical intervention for weight control and treatment of GERD has been highly successful in our experience both
with respect to weight control and to the reduction of reflux symptoms. Depending upon endoscopic and operative findings a
RYGBP with or without an antireflux procedure can provide dramatic improvement. Gastrectomy with antireflux modifications
is appropriate in selected cases. 相似文献
4.
5.
M P Sherman M D Roth H Gong D P Tashkin 《Pharmacology, biochemistry, and behavior》1991,40(3):663-669
Pulmonary alveolar macrophages lavaged from tobacco smokers release increased levels of oxidants and have been implicated in the pathophysiology of emphysema. It is unknown whether lung macrophages recovered from marijuana smokers also liberate excessive levels of oxidants. To evaluate this possibility, pulmonary alveolar macrophages were obtained by bronchoalveolar lavage from nonsmokers, smokers of marijuana only, smokers of tobacco only, and smokers of tobacco plus marijuana. Spontaneous and stimulated superoxide anion release was measured by the superoxide dismutase-inhibitable reduction of ferricytochrome c. These findings were correlated with recent lung function tests. Superoxide anion production by macrophages, studies of small airway integrity (closing volume, closing capacity, and the slope of Phase III of the single-breath nitrogen washout curve), and evaluation of alveolar gas exchange (diffusing capacity of carbon monoxide) were similar in both nonsmokers and marijuana smokers. However, tobacco smoking was associated with both significantly higher levels of superoxide anion release by pulmonary alveolar macrophages and significant abnormalities of small airway function and alveolar diffusing capacity. Based on the results of this study, pulmonary alveolar macrophages of marijuana-only smokers do not produce increased amounts of oxidants when compared to macrophages of non-smoking subjects. This observation may account for the absence of abnormalities in small airway function and alveolar diffusing capacity in marijuana-only smokers, in contrast to the presence of such findings in smokers of tobacco, regardless of marijuana use. 相似文献
6.
7.
8.
9.
F Cerabona M F Sherman J R Bonamo J Sklar 《The American journal of sports medicine》1988,16(6):603-609
One hundred two patients underwent an arthrotomy for the primary repair of an acute ACL tear with or without an associated collateral ligament injury. The mean age was 23 years. Forty-seven patients (46%) had meniscal injuries. Meniscal injuries were found in 41% of Group I patients (isolated ACL injuries) and in 54% of Group II patients (injured ACL/collateral ligaments). Twenty-eight medial and 22 lateral meniscal tears were noted. Twenty-six of the 50 meniscal tears (52%) were sutured in an attempt to repair the menisci. Of these, 20 of the medial (71%), and 6 of the lateral (27%) meniscal injuries were sutured. No patients in this series required a total meniscectomy. A thorough evaluation of the menisci is mandatory in knees with an acutely injured ACL. 相似文献
10.