全文获取类型
收费全文 | 9568篇 |
免费 | 673篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 461篇 |
妇产科学 | 180篇 |
基础医学 | 1088篇 |
口腔科学 | 660篇 |
临床医学 | 834篇 |
内科学 | 1642篇 |
皮肤病学 | 125篇 |
神经病学 | 837篇 |
特种医学 | 553篇 |
外国民族医学 | 3篇 |
外科学 | 1536篇 |
综合类 | 154篇 |
一般理论 | 6篇 |
预防医学 | 737篇 |
眼科学 | 237篇 |
药学 | 559篇 |
中国医学 | 6篇 |
肿瘤学 | 592篇 |
出版年
2021年 | 129篇 |
2019年 | 111篇 |
2018年 | 141篇 |
2017年 | 114篇 |
2016年 | 105篇 |
2015年 | 106篇 |
2014年 | 173篇 |
2013年 | 271篇 |
2012年 | 328篇 |
2011年 | 391篇 |
2010年 | 257篇 |
2009年 | 253篇 |
2008年 | 397篇 |
2007年 | 389篇 |
2006年 | 394篇 |
2005年 | 377篇 |
2004年 | 384篇 |
2003年 | 305篇 |
2002年 | 313篇 |
2001年 | 275篇 |
2000年 | 273篇 |
1999年 | 231篇 |
1998年 | 120篇 |
1997年 | 115篇 |
1996年 | 119篇 |
1995年 | 118篇 |
1994年 | 89篇 |
1992年 | 216篇 |
1991年 | 211篇 |
1990年 | 215篇 |
1989年 | 244篇 |
1988年 | 214篇 |
1987年 | 226篇 |
1986年 | 201篇 |
1985年 | 182篇 |
1984年 | 178篇 |
1983年 | 120篇 |
1982年 | 85篇 |
1981年 | 82篇 |
1980年 | 88篇 |
1979年 | 141篇 |
1978年 | 118篇 |
1977年 | 93篇 |
1976年 | 117篇 |
1975年 | 103篇 |
1974年 | 109篇 |
1973年 | 130篇 |
1972年 | 102篇 |
1971年 | 84篇 |
1970年 | 79篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Clinical experience with short-time hemodialysis. 总被引:4,自引:0,他引:4
After at least 6 months on conventional hemodialysis (cellulosic dialyzers, acetate dialysate, and a 3- to 4-hour treatment time), 56 patients were changed to short-time hemodialysis (less than 180 minutes) using polysulfone dialyzers and bicarbonate-containing dialysate. Treatment time decreased (191 +/- 5 v 147 +/- 5 min; P = 0.001), while Kt/V (1.22 +/- 0.04 v 1.29 +/- 0.06; P = NS) and normalized protein catabolic rate (pcr) (1.10 +/- 0.05 v 1.10 +/- 0.07 g/kg/d; P = NS) remained constant. When compared with the conventional period, 30 months of short-time hemodialysis resulted in no changes in predialysis blood pressure (BP) (151 +/- 2/84 +/- 1 v 151 +/- 2/86 +/- 1 mm Hg), postdialysis BP (144 +/- 2/81 +/- 1 v 143 +/- 3/84 +/- 1 mm Hg), interdialytic weight gain (2.4 +/- 0.1 v 2.7 +/- 0.2 kg), or blood urea nitrogen (BUN) (26.1 +/- 0.71 v 25.3 +/- 1.07 mmol/L [73 +/- 2 v 71 +/- 3 mg/dL]). Shorter treatment times were not associated with an increase in intradialytic complications. Actually, the frequency (%) of dialysis treatments associated with nausea (5.94 +/- 1.33 v 2.21 +/- 0.52), vomiting (3.12 +/- 0.87 v 0.54 +/- 0.14; P less than 0.05), headaches (5.60 +/- 1.13 v 2.03 +/- 0.52; P less than 0.05), and back pain (0.91 +/- 0.25 v 0.05 +/- 0.05; P less than 0.05) was decreased.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
42.
Mathematical approaches to the evaluation of the severity of the pathological process were used to develop an objective quantitative method to assess the severity of ventricular arrhythmias. The method is highly informative and reliable. It may be useful in the control of the efficacy of antiarrhythmic therapy and in the application of a differential approach to choice of therapy strategy for the patients. 相似文献
43.
44.
45.
A W Fyles A J Dembo R S Bush W Levin L A Manchul J F Pringle G A Rawlings J F Sturgeon G M Thomas J Simm 《International journal of radiation oncology, biology, physics》1992,22(5):847-851
Between 1971 and 1985, 598 patients with ovarian carcinoma were treated with abdomino-pelvic radiation therapy. Acute complications included nausea and vomiting in 364 patients (61%) which were severe in 36, and diarrhea in 407 patients (68%), severe in 35. Leukopenia (less than 2.0 x 10(9) cells/liter) and thrombocytopenia (less than 100 x 10(9) cells/liter) occurred in 64 patients (11%) each. Treatment interruptions occurred in 136 patients (23%), and 62 patients (10%) did not complete treatment. In both situations the most common cause was myelosuppression. Late complications included chronic diarrhea in 85 patients (14%), transient hepatic enzyme elevation in 224 (44%), and symptomatic basal pneumonitis in 23 (4%). Serious late bowel complications were infrequent: 25 patients (4.2%) developed bowel obstruction and 16 required operation. Multivariate analysis was unable to determine any significant prognostic factors for bowel obstruction; however, the moving-strip technique of radiation therapy was associated with a significantly greater risk of developing chronic diarrhea, pneumonitis, and hepatic enzyme elevation than was the open beam technique. We conclude that abdomino-pelvic radiation therapy as used in these patients is associated with modest acute complications and a low risk of serious late toxicity. 相似文献
46.
47.
The management of herniated lumbar intervertebral disc for patients not responding to an initial trial of conservative therapy is generally surgical. Little is known about the effect of continued conservative therapy on patients who have not improved or have deteriorated within the first 3 months. This study assessed which form of treatment, surgical or continued conservative therapy, is more cost-effective once an adequate trial of conservative therapy has failed. The study is a retrospective chart review of 55 white male truck drivers who presented with acutely herniated nucleus pulposus between 1985 and 1989. Twenty-five patients underwent surgery, and 30 underwent continued conservative therapy after initial rehabilitation. No significant difference was found in outcome (80% good or fair in both the surgical and conservative groups) or costs ($55,000 +/- $1,000/case during a 5-year period), hence no difference in the cost-effectiveness between the two treatment modalities (each $63,000 +/- $2,000/adjusted outcome). Conservatively treated patients, however, missed significantly more work. It was concluded that, for a patient not responding to the initial trial of conservative therapy, the option to undergo continued conservative treatment should be made available. 相似文献
48.
49.
50.