全文获取类型
收费全文 | 10602篇 |
免费 | 1323篇 |
国内免费 | 39篇 |
专业分类
耳鼻咽喉 | 158篇 |
儿科学 | 363篇 |
妇产科学 | 457篇 |
基础医学 | 1253篇 |
口腔科学 | 894篇 |
临床医学 | 972篇 |
内科学 | 2317篇 |
皮肤病学 | 381篇 |
神经病学 | 667篇 |
特种医学 | 323篇 |
外科学 | 1638篇 |
综合类 | 226篇 |
一般理论 | 4篇 |
预防医学 | 633篇 |
眼科学 | 237篇 |
药学 | 640篇 |
中国医学 | 47篇 |
肿瘤学 | 754篇 |
出版年
2023年 | 96篇 |
2022年 | 287篇 |
2021年 | 487篇 |
2020年 | 347篇 |
2019年 | 546篇 |
2018年 | 611篇 |
2017年 | 468篇 |
2016年 | 528篇 |
2015年 | 464篇 |
2014年 | 584篇 |
2013年 | 737篇 |
2012年 | 688篇 |
2011年 | 817篇 |
2010年 | 532篇 |
2009年 | 374篇 |
2008年 | 471篇 |
2007年 | 463篇 |
2006年 | 402篇 |
2005年 | 415篇 |
2004年 | 373篇 |
2003年 | 306篇 |
2002年 | 268篇 |
2001年 | 186篇 |
2000年 | 157篇 |
1999年 | 141篇 |
1998年 | 75篇 |
1997年 | 66篇 |
1996年 | 73篇 |
1995年 | 58篇 |
1994年 | 39篇 |
1993年 | 44篇 |
1992年 | 56篇 |
1991年 | 49篇 |
1990年 | 47篇 |
1989年 | 51篇 |
1988年 | 69篇 |
1987年 | 71篇 |
1986年 | 58篇 |
1985年 | 56篇 |
1984年 | 41篇 |
1983年 | 32篇 |
1982年 | 24篇 |
1981年 | 25篇 |
1980年 | 16篇 |
1979年 | 29篇 |
1977年 | 21篇 |
1976年 | 17篇 |
1975年 | 16篇 |
1973年 | 16篇 |
1969年 | 15篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
The purpose of the study was to determine the incidence of congenital anomalies among infants of diabetic mothers and compare this with the normal obstetric population in our hospital. Among 17 463 patients delivered at the King Fahd Hospital of the University, Al-Khobar, Saudi Arabia between January 1987 and December 1992 there were 466 diabetic mothers who delivered 466 singleton births. The incidence of diabetes was 2.6%. Among those 466 diabetic patients there were 132 with clinical diabetes which was present before pregnancy and which required insulin treatment during pregnancy and 334 with gestational diabetes. There were 14 lethal congenital anomalies among the infants of diabetic mothers (3%) compared with 69 anomalies in general obstetric population (0.4%). The difference = was very highly significant P = 0.001. Ten anomalies were responsible for 10 stillbirths and the other four anomalies resulted in four neonatal deaths. The most common anomalies were those of the central nervous system and multiple fetal anomalies, followed by cardiovascular system, renal and chromosomal anomalies. All those anomalies occurred in the infants whose mothers had clinical diabetes. 相似文献
12.
13.
M. O. Hassan O. T. Al Shafie W. J. Johnston 《Clinical physiology and functional imaging》1993,13(5):519-523
Summary. Eleven normotensive diabetics with noninsulin-dependent diabetes mellitus (NIDDM) (mean age 52.5 SD 8.2 years) and 11 controls (mean age 47.4 SD 8.9 years) had their ambulatory blood pressure and heart rate recorded non-invasively by the Oxford Medilog System in standard hospital conditions. The results were averaged as hourly means of systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial blood pressure (MAP), and heart rate (HR) for the 24-h period and similarly for the ‘awake’ period (14.16 h) and the ‘asleep’ period (8–10 h). Hourly means for diabetics and controls showed no differences in blood pressure and heart rate over the 24 h. During sleep, control subjects showed a significant drop in SBP (P < 0.001), DBP (P < 0.001), MAP (P < 0.001) and HR (P < 0.001). However, this nocturnal dip in blood pressure could not be demonstrated in the diabetic group. Blood pressure variability was significantly increased in diabetics compared to controls during waking hours (P < 0.01). These results indicate that in noninsulin-dependent diabetics during sleep there is loss of the nocturnal dip of BP seen in normal subjects, and they have increased BP variability. These may be contributing factors to the development of hypertension and the accelerated target organ damage (TOD) seen in diabetes., 相似文献
14.
15.
16.
The effect of testosterone and anabolic steroids on the size of sebaceous glands was studied by means of interactive morphometry in skin biopsies of power athletes. The subjects used self-administered high doses of testosterone and anabolic steroids during a 4-week strength training period. After 4 weeks' use of hormones, the area of sectioned sebaceous glands enlarged significantly by a factor of 89.2% (p less than 0.005). The number of cells in the so-called differentiating cell pool (DCP) and in the undifferentiated cell pool (UCP) also increased significantly (p less than 0.025, p less than 0.05, respectively). The size of the area occupied by UCP cells increased significantly (p less than 0.05). The study suggests that high doses of testosterone and anabolic steroids lead to an enlargement of sebaceous glands in male power athletes. 相似文献
17.
Some prostatic cancers (T4) spread out along the ureters to the kidneys. Patients, usually arrive with terminal renal failure and bladder retention and have often fast-advancing cancer with massive nodes invading. T.U.R., reimplantation of the ureters into the bladder dome or into a pso?c bladder and the specific treatment of the cancer, have often permitted these patients to survive for some years without any dialysis. In these cases we often find very important lower limbs oedema. With lymphatic nodes radiotherapy and subcutaneous injections of heparin, these oedema may regress completely. 相似文献
18.
A. Koşar K. Sarica B. Küpeli G. Alçiğir O. Süzer S. Küpeli 《International urology and nephrology》1997,29(3):351-356
Infertility may occur in patients with unilateral testicular torsion whose contralateral testis is intact. Depending on this
observation, the physicians have begun to examine the contralateral testis.
In the present prospective study we aimed to examine the histopathologic alterations occurring in the contralateral testicle
with time. Sixty adult male albino rats were included in the programme, and following experimental torsion the histopathologic
findings, especially those in the contralateral testis, were evaluated after 4–12 weeks. Long-term and high degree torsion
of the testicle led to varying degrees of deterioration in the germinal epithelium and interstitial cells of the contralateral
testicle. Histopathologic alterations were reversed in 12 weeks. Tubular diameter and testicular volume also decreased in
accordance with the histopathologic alteration.
In our opinion, orchiectomy following torsion of one testicle will limit potential histopathologic alterations in the contralateral
testicle. 相似文献
19.
A clinical and genetic study of 56 Saudi Wilson disease patients: identification of Saudi-specific mutations 总被引:3,自引:0,他引:3
M. Al Jumah R. Majumdar S. Al Rajeh A. Awada A. Al Zaben I. Al Traif A. R. Al Jumah Z. Rehana 《European journal of neurology》2004,11(2):121-124
Wilson disease (WD) is a hereditary disorder, with recessive transmission and genetic heterogeneity. Several mutations of ATP7B, the gene underlying WD, were reported in many ethnic groups. In this study, mutation screening in ATP7B of 56 Saudi Arabian WD patients was undertaken. The clinical data of all patients were recorded. The entire ATP7B coding sequence, including intron-exon boundaries were screened for mutation by the polymerase chain reaction (PCR)-based mutation detection technique and DNA sequencing. Thirty-nine patients were symptomatic at presentation and 17 subjects were pre-symptomatic siblings of affected patients. Fourteen patients had neurological, 11 patients had mixed (hepatic and neurological), and 14 patients had hepatic presentations. Family history suggestive of WD was present in 72% of cases and 68% had consanguineous parents. Genetic analysis showed disease-causing mutations in three exons (exons 8, 19 and 21) of the ATP7B gene in 28 patients (50%). Mutations in exons 21 (18 cases) and 19 (one case) were unique for Saudis. This large series of Saudi patients with WD has shown wide variability in the genomic substrate of WD. There is no correlation between genotype and clinical presentation. 相似文献
20.
Lichen planus pemphigoides. Is it a separate entity? 总被引:1,自引:0,他引:1
R. K. Joshi D. Natukorala A. Abanmi T.Al Awadi 《The British journal of dermatology》1994,130(4):537-538